F. Neat Words
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output
Input

The input consists of a single string of uppercase letters A-Z. The length of the string is between 1 and 10 characters, inclusive.

Output

Output "YES" or "NO".

Examples
Input
NEAT
Output
YES
Input
WORD
Output
NO
Input
CODER
Output
NO
Input
APRILFOOL
Output
NO
Input
AI
Output
YES
Input
JUROR
Output
YES
Input
YES
Output
NO