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

bool silent( string s ){
  static wstring_convert< codecvt_utf8_utf16< char16_t >, char16_t > converter;
  u16string t = converter.from_bytes( s );
  for( auto &ch : t )
    if( ch == u'…' )
      return false;
  return true;
}

signed main(){
  string s; cin >> s;
  int ans = 0;
  for( int i = 0; i < s.size(); ++i )
    for( int j = i; j < s.size(); ++j )
      if( silent( s.substr( i, j - i + 1 ) ) )
        ans = max( ans, j - i + 1 );
  cout << ans << endl;
  return 0;
}