diff --git a/mutations.py b/mutations.py
new file mode 100644
index 0000000..fe98a9c
--- /dev/null
+++ b/mutations.py
@@ -0,0 +1,7 @@
+def mutations(words):
+    for l in words[1].lower():
+        try:
+            words[0].lower().index(l, 0)
+        except ValueError:
+            return False
+        return True