diff --git a/pair_sum.py b/pair_sum.py
index e69de29..edb985d 100644
--- a/pair_sum.py
+++ b/pair_sum.py
@@ -0,0 +1,10 @@
+def pairSum(l,n):
+    result = []
+    if len(l)<2:
+        print('error')
+    else:
+        for i in  l:
+            for j in l:
+                if(i+j == n and not(i==j)):
+                    result.append(tuple(sorted((i,j))))
+    return list(set(result))
diff --git a/pair_sum.pyc b/pair_sum.pyc
new file mode 100644
index 0000000..5818bc0
Binary files /dev/null and b/pair_sum.pyc differ
diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..91a5a87
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..1baa4cb
Binary files /dev/null and b/tests/test_pairSum.pyc differ