#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    string S;
    cin >> S;
    int serial = 0;
    int ans = 0;
    for(int i = 0; i < S.size(); i++){
        if(S[i] == -30){
            serial++;
            i += 2;
        }else{
            ans = max(ans, serial);
            serial = 0;
        }
    }
    ans = max(ans, serial);
    cout << ans << endl;
}