Neat Words

Description:

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".

Sample Input:

NEAT

Sample Output:

YES

Sample Input:

WORD

Sample Output:

NO

Sample Input:

CODER

Sample Output:

NO

Sample Input:

APRILFOOL

Sample Output:

NO

Sample Input:

AI

Sample Output:

YES

Sample Input:

JUROR

Sample Output:

YES

Sample Input:

YES

Sample Output:

NO