diff --git a/subjects/front-back/README.md b/subjects/front-back/README.md
index bc88d709..2d40c00b 100644
--- a/subjects/front-back/README.md
+++ b/subjects/front-back/README.md
@@ -6,7 +6,7 @@ Write a program that prints the previous and next alphabet of the alphabet.
 - If the number of arguments is different from 1, print (`'\n'`).
 - If the length of the argument is different from 1, print (`'\n'`)
 - If the argument is not a letter, print (`'\n'`)
-- Print the previous alphabet and the next alphabet except for the last and the first alphabet of the alphabet.
+- There are no letters to print before 'a' or after 'z'.
 
 ### Usage