Description

You are given a DNA sequence: a string consisting of characters A, C, G, and T. Your task is to find the longest repetition in the sequence. This is a maximum-length substring containing only one type of character.

Format

Input

The only input line contains a string of n characters.

Output

Print one integer: the length of the longest repetition.

Samples

ATTCGGGA

3

Limitation

• 1 ≤ n ≤ $10^6$
• Time limit: 1.00 s
• Memory limit: 512 MB