diff --git a/lib/meta.js b/lib/meta.js
index a08ee57..aac32d4 100644
--- a/lib/meta.js
+++ b/lib/meta.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return /\.$/.test(str);
 }
\ No newline at end of file
diff --git a/lib/quantifier.js b/lib/quantifier.js
index a08ee57..b41efac 100644
--- a/lib/quantifier.js
+++ b/lib/quantifier.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return /^\d+(\.jpe?g)$/.test(str);
 }
\ No newline at end of file
diff --git a/lib/split.js b/lib/split.js
index a08ee57..92f472c 100644
--- a/lib/split.js
+++ b/lib/split.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return str.split(/\s*,\s*/);
 }
\ No newline at end of file