diff --git a/tic_tac_toe(str row to index).py b/tic_tac_toe(str row to index).py
index e649ae0..6629cc3 100644
--- a/tic_tac_toe(str row to index).py	
+++ b/tic_tac_toe(str row to index).py	
@@ -26,7 +26,14 @@
   "B":1,
   "C":2
 }
-def get_row_col(S):
-  return ( int(S[1])-1 , col_dict[S[0]] )
-  
-print(get_row_col("C1"))
\ No newline at end of file
+def get_row_col(s):
+    return (int(s[1]) - 1, col_dict.get(s[0], -1))
+
+cell = input("Enter a cell identifier (e.g., A3) to get the corresponding (row, column) coordinates: ").upper()
+
+coordinates = get_row_col(cell)
+
+if coordinates[1] == -1:
+    print("Invalid input. Please enter a valid cell identifier.")
+else:
+    print(f"The coordinates for {cell} are: {coordinates}")
\ No newline at end of file