diff --git a/README.md b/README.md
index 319ef31..b552977 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,13 @@ usage:
 ("X", "Y", and "Z" is int)
 
 XdY: throw X Y-side dice(s).
+
 YcX: choose X number(s) from 1 to Y.
+
 XsY: get the sum of X Y-side dice(s).
+
 XsYxZ: get the sum of X Y-side dice(s) for Z times.
 
 add "z" in front or back of the command to print the outcome in one line.
+
 input "q" or "quit" to exit.