#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;
using ll = long long;

int main()
{
    string s, t;
    ll sum1 = 0;
    cin >> s;
    for (int i = 0; i < s.size(); i++){
        if (s[i] == 'c' || s[i] == 'w') t += s[i];
    }
    for (int i = 0; i < t.size(); i++){
        if (t[i] == 'c'){
            int cnt = 0;
            for (int j = i+1; j < t.size(); j++){
                if (t[j] == 'w') cnt++;
            }
            if (cnt >= 2) sum1 += cnt * (cnt - 1) / 2;
        }
    }
    cout << sum1 << endl;
}