diff --git a/your-code/main.ipynb b/your-code/main.ipynb
index f3bde01..618ee41 100644
--- a/your-code/main.ipynb
+++ b/your-code/main.ipynb
@@ -28,7 +28,14 @@
    "id": "630d7e4d",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "import pandas as pd\n",
+    "import numpy as np\n",
+    "import random as rd\n",
+    "import math as m\n",
+    "import subprocess\n",
+    "import sys"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -46,6 +53,20 @@
    "metadata": {},
    "source": []
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cc0aa254",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "square = []\n",
+    "\n",
+    "square = [i**2 for i in range(1, 21)]\n",
+    "\n",
+    "print(square)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "b421e0cb",
@@ -63,7 +84,13 @@
    "id": "c047115a",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "square = []\n",
+    "\n",
+    "square = [i**2 for i in range(1, 101)]\n",
+    "\n",
+    "print(square)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -81,7 +108,12 @@
    "id": "e23d87ea",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "my_list = []\n",
+    "\n",
+    "my_list = [i for i in range(-10, 1)]\n",
+    "print(my_list)\n"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -99,7 +131,12 @@
    "id": "d8d1c865",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "odds = []\n",
+    "\n",
+    "odds = [i for i in range(1, 101, 2)]\n",
+    "print(odds)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -116,7 +153,11 @@
    "id": "6a9cfb8c",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "divisible_by_seven = []\n",
+    "odds = [i for i in range(7, 1000, 7)]\n",
+    "print(odds)\n"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -134,19 +175,14 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# You can use the following test string but feel free to modify at your convenience\n",
-    "\n",
-    "teststring = 'Find all of the words in a string that are monosyllabic'"
+    "non_vowels = ['B', 'b', 'C', 'c', 'D', 'd', 'F', 'f', 'G', 'g', 'H', 'h', 'I', 'J', 'j', 'K', 'k', 'L', 'l', 'M', 'm', 'N', 'n', 'P', 'p', 'Q', 'q', 'R', 'r', 'S', 's', 'T', 't', 'V', 'v', 'W', 'w', 'X', 'x', 'Y', 'y', 'Z','z']\n",
+    "teststring = 'Find all of the words in a string that are monosyllabic'\n",
+    "non_vowel_list = [char for char in teststring if char in non_vowels]\n",
+    "new_string = ''.join(non_vowel_list)\n",
+    "print(new_string)\n",
+    "\n"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "d5fc7426",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "277d491e",
@@ -164,7 +200,13 @@
    "id": "3a43399c",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "capital_letters = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']\n",
+    "teststring_1 = 'The Quick Brown Fox Jumped Over The Lazy Dog'\n",
+    "capital_letters = [char for char in teststring_1 if char in capital_letters]\n",
+    "new_string_1 = ''.join(capital_letters)\n",
+    "print(new_string_1)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -183,7 +225,13 @@
    "id": "3ddb68df",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "consonants = ['B', 'b', 'C', 'c', 'D', 'd', 'F', 'f', 'G', 'g', 'H', 'h', 'I', 'J', 'j', 'K', 'k', 'L', 'l', 'M', 'm', 'N', 'n', 'P', 'p', 'Q', 'q', 'R', 'r', 'S', 's', 'T', 't', 'V', 'v', 'W', 'w', 'X', 'x', 'Y', 'y', 'Z','z''b', 'c', 'd', 'f', 'g', 'h', 'j', 'k', 'l', 'm', 'n', 'p', 'q', 'r', 's', 't', 'v', 'w', 'x', 'y', 'z']\n",
+    "teststring_2 = 'The Quick Brown Fox Jumped Over The Lazy Dog'\n",
+    "consonants = [char for char in teststring_1 if char in consonants]\n",
+    "new_string_2 = ''.join(consonants)\n",
+    "print(new_string_2)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -205,7 +253,21 @@
    "id": "22bb13eb",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "import os"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a1a7c5d0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "directory_path = 'C:/Users/marti/OneDrive/Escritorio/ironhack/lectures'\n",
+    "lectures_folders = [f for f in os.listdir(directory_path) if os.path.isdir(os.path.join(directory_path, f))]\n",
+    "lectures_folders"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -218,13 +280,32 @@
     "Remember to use list comprehensions and to print your results"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d4622e62",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import random"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
    "id": "120b29bd",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "random_list_1 = random.sample(range(1, 101), 10)\n",
+    "print(\"Random_list_1 = \", random_list_1)\n",
+    "random_list_2 = random.sample(range(1, 101), 10)\n",
+    "print(\"Random_list_2 = \",random_list_2)\n",
+    "random_list_3 = random.sample(range(1, 101), 10)\n",
+    "print(\"Random_list_3 = \",random_list_3)\n",
+    "random_list_4 = random.sample(range(1, 101), 10)\n",
+    "print(\"Random_list_4 = \",random_list_4)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -252,7 +333,10 @@
    "id": "b6bcef37",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "flatten_list = [item for sublist in list_of_lists for item in sublist]\n",
+    "flatten_list"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -283,7 +367,10 @@
    "id": "a932aff5",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "floats = [int(item) for sublist in list_of_lists for item in sublist]\n",
+    "floats"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -300,18 +387,13 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "for i in ['a','b','c']:\n",
-    "    print i**2"
+    "try:\n",
+    "    for i in ['a','b','c']:\n",
+    "        print (i**2)\n",
+    "except:\n",
+    "    print(\"TypeError\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "3605fc78",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "bda76246",
@@ -333,18 +415,13 @@
    "source": [
     "x = 5\n",
     "y = 0\n",
-    "\n",
-    "z = x/y"
+    "try:\n",
+    "    z = x/y\n",
+    "    print(z)\n",
+    "except:\n",
+    "    print(\"ZeroDivisionError\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "976fec9f",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "85ea78c5",
@@ -362,18 +439,13 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "abc=[10,20,20]\n",
-    "print(abc[3])"
+    "try:\n",
+    "    abc=[10,20,20]\n",
+    "    print(abc[2])\n",
+    "except:\n",
+    "    print(\"IndexError\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "cfcf15f0",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "10223640",
@@ -392,7 +464,20 @@
    "id": "3c1f141b",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "a = 5\n",
+    "b = 10\n",
+    "\n",
+    "try: \n",
+    "    result = a / b\n",
+    "    print(result)\n",
+    "except ZeroDivisionError:\n",
+    "    print(\"ZeroDivisionError\")\n",
+    "except TypeError:\n",
+    "    print(\"Type Error\")\n",
+    "except Exception as e:\n",
+    "    print(f\"An unexpected error occurred: {e}\")"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -406,35 +491,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "id": "b73f824c",
    "metadata": {},
-   "outputs": [
-    {
-     "ename": "FileNotFoundError",
-     "evalue": "[Errno 2] No such file or directory: 'testfile'",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mFileNotFoundError\u001b[0m                         Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-1-cd8832385d15>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mf\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'testfile'\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m'r'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0mf\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mwrite\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Test write this'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mFileNotFoundError\u001b[0m: [Errno 2] No such file or directory: 'testfile'"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
-    "f = open('testfile','r')\n",
-    "f.write('Test write this')"
+    "try:\n",
+    "    f = open('testfile','r')\n",
+    "    f.write('Test write this')\n",
+    "except: \n",
+    "    print(\"FileNotFoundError\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "5a1cb361",
-   "metadata": {},
-   "outputs": [],
-   "source": []
-  },
   {
    "cell_type": "markdown",
    "id": "a028ccb8",
@@ -447,23 +515,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "id": "5f639ab1",
    "metadata": {},
-   "outputs": [
-    {
-     "ename": "IndentationError",
-     "evalue": "unexpected indent (<ipython-input-2-f4ec7bf448fd>, line 2)",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-2-f4ec7bf448fd>\"\u001b[0;36m, line \u001b[0;32m2\u001b[0m\n\u001b[0;31m    line = f.readline()\u001b[0m\n\u001b[0m    ^\u001b[0m\n\u001b[0;31mIndentationError\u001b[0m\u001b[0;31m:\u001b[0m unexpected indent\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
-    "fp = open('myfile.txt')\n",
-    "    line = f.readline()\n",
-    "    i = int(s.strip())\n"
+    "try: \n",
+    "    try: \n",
+    "        fp = open('myfile.txt')\n",
+    "        line = f.readline()\n",
+    "        i = int(s.strip())\n",
+    "    except FileNotFoundError:\n",
+    "        print(\"FileNotFoundError\")\n",
+    "except TypeError:\n",
+    "    print(\"TypeError\")"
    ]
   },
   {
@@ -481,23 +546,20 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": null,
+   "id": "1d959aa0",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import sys"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
    "id": "3f043ef6",
    "metadata": {},
-   "outputs": [
-    {
-     "ename": "NameError",
-     "evalue": "name 'sys' is not defined",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-5-a780eef459e9>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      2\u001b[0m     \u001b[0;32massert\u001b[0m \u001b[0;34m(\u001b[0m\u001b[0;34m'linux'\u001b[0m \u001b[0;32min\u001b[0m \u001b[0msys\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mplatform\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"Function can only run on Linux systems.\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      3\u001b[0m     \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Doing something.'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 4\u001b[0;31m \u001b[0mlinux_interaction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
-      "\u001b[0;32m<ipython-input-5-a780eef459e9>\u001b[0m in \u001b[0;36mlinux_interaction\u001b[0;34m()\u001b[0m\n\u001b[1;32m      1\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0mlinux_interaction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 2\u001b[0;31m     \u001b[0;32massert\u001b[0m \u001b[0;34m(\u001b[0m\u001b[0;34m'linux'\u001b[0m \u001b[0;32min\u001b[0m \u001b[0msys\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mplatform\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m\"Function can only run on Linux systems.\"\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      3\u001b[0m     \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'Doing something.'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0mlinux_interaction\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mNameError\u001b[0m: name 'sys' is not defined"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "def linux_interaction():\n",
     "    assert ('linux' in sys.platform), \"Function can only run on Linux systems.\"\n",
@@ -511,7 +573,23 @@
    "id": "1643bbed",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "def linux_interaction():\n",
+    "    try: \n",
+    "        assert ('linux' in sys.platform)\n",
+    "    except AssertionError:\n",
+    "        return \"AssertionError: Function can only run on Linux systems.\""
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "b6a1abae",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "linux_interaction()"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -548,7 +626,28 @@
    "id": "94c2e76e",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "def square_number(x):\n",
+    "    while True:\n",
+    "        try:\n",
+    "            x = int(x)\n",
+    "        except ValueError:\n",
+    "            print(\"Invalid input. Please enter a valid number.\")\n",
+    "        else:\n",
+    "            result = x**2\n",
+    "            print(f\"The square of {x} is:\", result)\n",
+    "            break "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "80d0cc9f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "square_number(5)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -567,7 +666,12 @@
    "id": "90d3aa37",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "results = []\n",
+    "\n",
+    "res_1000 = [i for i in range(1, 1001) if any(i % digit == 0 for digit in range(2, 10))]\n",
+    "print(res_1000)"
+   ]
   },
   {
    "cell_type": "markdown",
@@ -583,7 +687,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 13,
    "id": "86fa19bf",
    "metadata": {},
    "outputs": [
@@ -591,33 +695,55 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Enter Total Marks Scored: ass\n"
-     ]
-    },
-    {
-     "ename": "ValueError",
-     "evalue": "invalid literal for int() with base 10: 'ass'",
-     "output_type": "error",
-     "traceback": [
-      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
-      "\u001b[0;31mValueError\u001b[0m                                Traceback (most recent call last)",
-      "\u001b[0;32m<ipython-input-6-94b26594c4c4>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mTotal_Marks\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Enter Total Marks Scored: \"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0mNum_of_Sections\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m\"Enter Num of Sections: \"\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
-      "\u001b[0;31mValueError\u001b[0m: invalid literal for int() with base 10: 'ass'"
+      "Enter Total Marks Scored: 5\n",
+      "Enter Num of Sections: l\n"
      ]
     }
    ],
    "source": [
-    "Total_Marks = int(input(\"Enter Total Marks Scored: \")) \n",
-    "Num_of_Sections = int(input(\"Enter Num of Sections: \"))"
+    "Total_Marks = input(\"Enter Total Marks Scored: \")\n",
+    "Num_of_Sections = input(\"Enter Num of Sections: \")"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "id": "f80bb764",
    "metadata": {},
    "outputs": [],
-   "source": []
+   "source": [
+    "class custom_error(Exception):\n",
+    "    def __init__(self, message=\"A custom error occurred.\"):\n",
+    "        self.message = message\n",
+    "        super().__init__(self.message)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "c43beaf0",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Invalid input. Please enter a valid number.\n"
+     ]
+    }
+   ],
+   "source": [
+    "try:\n",
+    "    Num_of_Sections = int(Num_of_Sections)\n",
+    "    if Num_of_Sections < 2:\n",
+    "        raise custom_error()\n",
+    "except ValueError:\n",
+    "    print(\"Invalid input. Please enter a valid number.\")\n",
+    "except custom_error as e:\n",
+    "    print(f\"Error: {e}\")\n",
+    "else:\n",
+    "    print(f\"You entered Num of Sections: {Num_of_Sections}\")"
+   ]
   }
  ],
  "metadata": {
@@ -636,7 +762,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.13"
+   "version": "3.11.5"
   },
   "toc": {
    "base_numbering": 1,