diff --git a/pair_sum.py b/pair_sum.py
index e69de29..0be89c9 100644
--- a/pair_sum.py
+++ b/pair_sum.py
@@ -0,0 +1,4 @@
+def pairSum(ls, sum):
+    return [(x, y) for i, x in enumerate(ls) for y in ls[i+1:] if x+y == sum]
+
+print(pairSum([1,2,3,4,5,6,7,8,9],9))
diff --git a/pair_sum.pyc b/pair_sum.pyc
new file mode 100644
index 0000000..aa74d94
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..0a3e584
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_pairSum.pyc b/tests/test_pairSum.pyc
new file mode 100644
index 0000000..2ca9fea
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