Decode the message


Description

Your friend sent you an encrypted message consisting of characters A, C, G and T only .You know the decoded message is the longest repetition in the sequence. That is a maximum-length substring containing only one kind of character. Can you decode it?

Input

Input Format

The only input line contains a string of n characters.

Constraints

1 <= n <= 10^6

Output

Print one integer: the length of the longest repetition.

Sample Input 1 

ATTCGGGA

Sample Output 1

3

Hint

Sample Input 1 Explanation

In the given string , substring GGG of length 3 is the longest.

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