Remove one level of bullet points

subjects/front-back/README.md

@@ -2,11 +2,11 @@
 
 ### Instructions
 
-- Write a program that prints the previous and next alphabet of a given 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.
+Write a program that prints the previous and next alphabet of a given 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.
 
 ### Usage