diff --git a/README.md b/README.md
index 9555d49..e4234ff 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,10 @@
 tjjt как дела
 вываыв
 
-ивавырлываы
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+ивавырлываы
+
+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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