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

int main() {
  string S;
  cin >> S;
  int ans = 0;
  for (int i = 0, j = 0; i < S.size(); i += 3) {
    if (S.at(i) == -30) ans = max(ans, ++j);
    else j = 0;
  }
  cout << ans << "\n";
}