403030: GYM100971 K Palindromization

Mihahim has a string s. He wants to delete exactly one character from it so that the resulting string would be a palindrome. Determine if he can do it, and if he can, what character should be deleted.

The input contains a string s of length (2 ≤ |s| ≤ 200000), consisting of lowercase Latin letters.

If the solution exists, output «YES» (without quotes) in the first line. Then in the second line output a single integer x — the number of the character that should be removed from s so that the resulting string would be a palindrome. The characters in the string are numbered from 1. If there are several possible solutions, output any of them.

If the solution doesn't exist, output «NO» (without quotes).

evertree

YES
2

emerald

NO

aa

YES
2