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

signed main(){
  wstring_convert<codecvt_utf8_utf16<char16_t>, char16_t> converter;
  string s; cin >> s;
  u16string us = converter.from_bytes( s );
  int ans = 0, cnt = 0;
  for( auto ch : us ){
    if( ch == u'…' )
      ans = max( ans, ++cnt );
    else
      cnt = 0;
  }
  cout << ans << endl;
  return 0;
}