#include <iostream>
#include <algorithm>
#include<string>
using namespace std;
int main(){
    string S;
    cin >> S;
    int num = 0,ans = 0 , i;
    for(i = 0; i < S.size(); i++){
        if(S[i] == -30){
            num++;
            i += 2;
        }
        else{
            ans = max(ans, num);
            num = 0;
        }
    }
    ans = max(ans, num);
    cout << ans << endl;
}