diff --git a/build.py b/build.py
index e69de29..0fe4cf3 100644
--- a/build.py
+++ b/build.py
@@ -0,0 +1,8 @@
+def is_rotation(string1, string2):
+    if string1 == None or string2 == None:
+        return False
+    elif string1 == string2 or (string2 in string1*2 and len(string1) == len(string2)):
+        return True
+    else:
+        return False
+is_rotation (string1 = 'hello', string2 = 'ohleol')
diff --git a/build.pyc b/build.pyc
new file mode 100644
index 0000000..dbb2699
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..42d58ff
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..6b79c47
Binary files /dev/null and b/tests/test_is_rotation.pyc differ