diff --git a/.results.json b/.results.json
new file mode 100644
index 0000000..d29f727
--- /dev/null
+++ b/.results.json
@@ -0,0 +1 @@
+{"stats": {"passes": 1, "skipped": 0, "encoding": "UTF-8", "errors": 0, "failures": 0, "total": 1}, "results": [{"classname": "tests.test_solution:TestSolution", "type": "success", "name": "test_solution", "time": 0.0005080699920654297}]}
\ No newline at end of file
diff --git a/build.py b/build.py
index 6d455db..adc0eaf 100644
--- a/build.py
+++ b/build.py
@@ -1,9 +1,12 @@
 def solution(list):
-    '''
-    Enter your code here
-    '''
     unique = []
+    seen = set()
     for x in list:
-        if x not in unique:
-            unique.append(x)
-    return (unique)
\ No newline at end of file
+        if x not in seen:
+            seen.add(x)
+    for y in seen:
+        unique.append(y)
+    return unique
+
+l = [1, 3, 4, 3 ,5]
+solution(l)
diff --git a/build.pyc b/build.pyc
new file mode 100644
index 0000000..af92602
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..b1c84ae
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_solution.pyc b/tests/test_solution.pyc
new file mode 100644
index 0000000..89504f9
Binary files /dev/null and b/tests/test_solution.pyc differ