//  Repetitions

#include<bits/stdc++.h>

using namespace std;

int main() {
    string s;
    cin >> s;
    int max_count = 0;
    int current_count = 0;
    char current = ' ';
    for (auto c : s) {
        if (c == current) {
            current_count ++;
            max_count = max(max_count, current_count);
        } else {
            current = c;
            current_count = 1;
            max_count = max(max_count, current_count);
        }
    }
    cout << max_count << endl;
    return 0;
}