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

int main() {
  string s;
  cin >> s;
  int r = 0, t = 0;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == -30) {
      t++;
      i += 2;
    }
    else t = 0;

    r = max(t, r);
  }
  cout << r << endl;
  return 0;
}