#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

#define RREP(i,s,e) for (i = e-1; i >= s; i--)
#define rrep(i,n) RREP(i,0,n)
#define REP(i,s,e) for (i = s; i < e; i++)
#define rep(i,n) REP(i,0,n)
#define INF 1e8

typedef long long ll;

int main() {
    string s;
    ll c, cw, cww;
    cin >> s;
    c = cw = cww = 0;
    for (auto x : s) {
        if (x == 'c')
            c++;
        else if (x == 'w' && c > 0) {
            if (cw > 0)
                cww += cw;
            cw += c;
        }
    }
    cout << cww << endl;
    return 0;
}