diff --git a/build.py b/build.py
index e69de29..06aed33 100644
--- a/build.py
+++ b/build.py
@@ -0,0 +1,12 @@
+def is_rotation(s1,s2):
+    if(s1 == None or s2==None):
+        return False
+    if(len(s1) != len(s2)):
+        return False
+    elif ( len(set(s1).intersection(set(s2))) == len(set(s1)) ):
+        return True
+    else:
+        return False
+
+
+print(is_rotation('hello','olleh'))
diff --git a/build.pyc b/build.pyc
new file mode 100644
index 0000000..9ee438a
Binary files /dev/null and b/build.pyc differ
diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..5d4bd8f
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_is_rotation.pyc b/tests/test_is_rotation.pyc
new file mode 100644
index 0000000..ce31501
Binary files /dev/null and b/tests/test_is_rotation.pyc differ