#include <bits/stdc++.h>

using namespace std;

int main(void) {
  string s;
  cin >> s;

  int ans = 0, sz = s.size(), l = 0, r = 0;
  while (l < sz) {
    while (l < sz && s.substr(l, 3) != "…") l += 3, r += 3;
    while (r < sz && s.substr(r, 3) == "…") r += 3;
    ans = max(ans, (r - l) / 3);
    l = r;
  }
  cout << ans << endl;

  return 0;
}