diff --git a/README.md b/README.md
index e4234ff..165b659 100644
--- a/README.md
+++ b/README.md
@@ -9,4 +9,21 @@ def symmetric_difference(a: list, b: list) -> list:
     set_a = set(a)
     set_b = set(b)
     result = set_a.symmetric_difference(set_b)
-    return sorted(result)
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+    return sorted(result)
+
+или
+
+
+def symmetric_difference(a: list, b: list) -> list:
+    return sorted(set(a).symmetric_difference(set(b)))
+
+
+# Тесты
+assert symmetric_difference([1, 2, 3], [2, 3, 4]) == [1, 4]
+assert symmetric_difference([1, 1, 2], [2, 2, 3]) == [1, 3]
+assert symmetric_difference([], [1, 2]) == [1, 2]
+assert symmetric_difference([1, 2], []) == [1, 2]
+assert symmetric_difference([1, 1], [1, 1]) == []
+assert symmetric_difference([5, 6, 7], [7, 8, 9]) == [5, 6, 8, 9]
+
+print("Все тесты пройдены!")
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