#include <bits/stdc++.h>
using namespace std;

int main() {
	string s;
	cin >> s;
	
	int res = 1;
	char curr_char = ' ';
	int curr = 1;
	
	for(int i = 0; i < s.size(); i++) {
		if(s[i] == curr_char) {
			curr++;
		} else {
			res = max(res, curr);
			curr_char = s[i];
			curr = 1;
		}
	}
	
	cout << max(res, curr);
	
	return 0;
}