#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

string s;
int n, m;

int main() {
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == -30 && s[i + 1] == -128 && s[i + 2] == -90) {
      n++;
      i += 2;
      m = max(m, n);
    } else {
      n = 0;
    }
  }
  cout << m << endl;
  return 0;
}