#include<iostream>
#include<string>
#include<vector>
using namespace std;
int main(){
  int cc=0,w=0;
  string s;
  cin >> s;
  int i=0;
  while(s[i] != '\0'){
    switch(s[i]){
      case 'c':
        cc++;
        break;
      case 'w':
        w++;
        break;
      default:
        break;
    }
    i++;
  }
  cc--;
  if(cc >= w)
    cout << cc << "\n";
  else
    cout << 2 << "\n";
  return 0;
}