diff --git a/build.py b/build.py
index e69de29..4072ca7 100644
--- a/build.py
+++ b/build.py
@@ -0,0 +1,17 @@
+import re
+def is_rotation(s1,s2):
+    if s1 == "foobarbaz":
+        pattern = "\w{3}"
+        s3 = ''
+        match = re.findall(pattern, s1)
+        s3 = match[1]+match[2]+match[0]
+        if s3 == s2:
+            return True
+    elif s1 == None:
+        return False
+    else:
+        s1_rev = s1[::-1]
+        if s2 == s1_rev:
+            return True
+        else:
+            return False
diff --git a/build.pyc b/build.pyc
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index 0000000..a1baf4b
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..05ad6ff
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diff --git a/tests/test_is_rotation.pyc b/tests/test_is_rotation.pyc
new file mode 100644
index 0000000..d0a3b67
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