diff --git a/lib/meta.js b/lib/meta.js
index a08ee57..227f16d 100644
--- a/lib/meta.js
+++ b/lib/meta.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  var reg=/\.$/;
+  return reg.test(str);
 }
\ No newline at end of file
diff --git a/lib/quantifier.js b/lib/quantifier.js
index a08ee57..c0e6869 100644
--- a/lib/quantifier.js
+++ b/lib/quantifier.js
@@ -1,3 +1,5 @@
 module.exports = function (str) {
   // TODO
+  var reg=/^\d+\.jpe?g$/;
+  return reg.test(str);
 }
\ No newline at end of file
diff --git a/lib/split.js b/lib/split.js
index a08ee57..b49231c 100644
--- a/lib/split.js
+++ b/lib/split.js
@@ -1,3 +1,4 @@
 module.exports = function (str) {
   // TODO
+  return str.replace(/\s/g,'').split(',')
 }
\ No newline at end of file