diff --git a/AgapovaDS/428b.md b/AgapovaDS/428b.md
index fb8a210..8f70b1f 100644
--- a/AgapovaDS/428b.md
+++ b/AgapovaDS/428b.md
@@ -1 +1 @@
-428
\ No newline at end of file
+428b
\ No newline at end of file