#include <iostream>
#include <iomanip>
typedef unsigned long long ul;
typedef signed long long ll;

int main(void)
{
  std::cin.tie(0);
  std::ios::sync_with_stdio(false);
  std::cout << std::fixed << std::setprecision(15);
  std::string s;
  std::cin >> s;
  ll c = 0, w = 0;
  for (auto ch : s) {
    if (ch == 'c') c++;
    else w++;
  }
  std::cout << std::min(c-1, w) << std::endl;
  return 0;
}