#include <bits/stdc++.h>

using namespace std;

int main(void)
{
  cin.tie(0);
  ios::sync_with_stdio(false);

  string s;

  cin >> s;

  int cntc = 0;
  int cntw = 0;

  for(auto it : s)
  {
    if(it=='c') cntc++;
    else cntw++;
  }


  int res = max(0,cntc-1);
  res = min(res,max(0,cntw));

  cout << res << '\n';

  return 0;
}