#include <iostream>
using namespace std;

int count5126(string str, string a) {
    int i = 0, cnt = 0;
    if (a == "") { return -1; }
    while ((i = str.find(a, i)) > -1) { ++cnt; i += a.size(); }
    return cnt;
}

int main() {
    string s;
    int c, w;
    cin >> s;
    c = count5126(s, "c") - 1;
    w = count5126(s, "w");
    cout << (c < w ? c : w) << endl;
    return 0;
}