diff --git a/lib/anchor_end.js b/lib/anchor_end.js
index 56e8b85..95f6aeb 100644
--- a/lib/anchor_end.js
+++ b/lib/anchor_end.js
@@ -1,3 +1,5 @@
-module.exports = function (str) {
-  // TOOD
-}
\ No newline at end of file
+function anchor_end (str) {
+  return /BANANAS$/.test(str);
+}
+
+module.exports = anchor_end;
\ No newline at end of file
diff --git a/lib/anchor_start.js b/lib/anchor_start.js
index 56e8b85..e49ad15 100644
--- a/lib/anchor_start.js
+++ b/lib/anchor_start.js
@@ -1,3 +1,4 @@
-module.exports = function (str) {
-  // TOOD
-}
\ No newline at end of file
+function anchor_start (str) {
+  return /^LITERALLY/.test(str);
+}
+module.exports = anchor_start;
\ No newline at end of file
diff --git a/lib/char_class.js b/lib/char_class.js
index a08ee57..93fbcae 100644
--- a/lib/char_class.js
+++ b/lib/char_class.js
@@ -1,3 +1,4 @@
-module.exports = function (str) {
-  // TODO
-}
\ No newline at end of file
+function char_class (str) {
+  return /^[^A-Zb]/.test(str);
+}
+module.exports = char_class;
\ No newline at end of file
diff --git a/lib/negated_char_class.js b/lib/negated_char_class.js
index a08ee57..ed69d7d 100644
--- a/lib/negated_char_class.js
+++ b/lib/negated_char_class.js
@@ -1,3 +1,5 @@
-module.exports = function (str) {
-  // TODO
-}
\ No newline at end of file
+function negated_char_class (str) {
+  return /\D[^A-Z]/.test(str);
+}
+
+module.exports = negated_char_class;
\ No newline at end of file