diff --git a/lib/anchor_end.js b/lib/anchor_end.js
index 56e8b85..9f242ab 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..0ce3071 100644
--- a/lib/anchor_start.js
+++ b/lib/anchor_start.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TOOD
+  const regx=/^LITERALLY/;
+  return regx.test(str);
 }
\ No newline at end of file
diff --git a/lib/char_class.js b/lib/char_class.js
index a08ee57..4ceabe4 100644
--- a/lib/char_class.js
+++ b/lib/char_class.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  const reg=/^[a1u4o]/;
+  return reg.test(str);
 }
\ No newline at end of file
diff --git a/lib/negated_char_class.js b/lib/negated_char_class.js
index a08ee57..9252d08 100644
--- a/lib/negated_char_class.js
+++ b/lib/negated_char_class.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return str.match(/\D[^A-Z]/)
 }
\ No newline at end of file