diff --git a/lib/anchor_end.js b/lib/anchor_end.js
index 56e8b85..5c5aa01 100644
--- a/lib/anchor_end.js
+++ b/lib/anchor_end.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TOOD
+    const reg = /BANANAS$/;
+    return reg.test(str);
 }
\ No newline at end of file
diff --git a/lib/anchor_start.js b/lib/anchor_start.js
index 56e8b85..73a6f5e 100644
--- a/lib/anchor_start.js
+++ b/lib/anchor_start.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TOOD
+    return /^(LITERALLY)/.test(str);
 }
\ No newline at end of file
diff --git a/lib/char_class.js b/lib/char_class.js
index a08ee57..cc2e2e3 100644
--- a/lib/char_class.js
+++ b/lib/char_class.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return /^[auo0-9]/.test(str);
 }
\ No newline at end of file
diff --git a/lib/negated_char_class.js b/lib/negated_char_class.js
index a08ee57..dabec25 100644
--- a/lib/negated_char_class.js
+++ b/lib/negated_char_class.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
-  // TODO
+    // TODO
+    return /[^0-9][^A-Z]/.test(str);
 }
\ No newline at end of file