#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    const string cww = "cww";

    string s;
    cin >> s;
    int n = s.size();

    vector<long long> dp(4, 0);
    dp[0] = 1;
    for(int i=0; i<n; ++i){
        for(int j=2; j>=0; --j){
            if(s[i] == cww[j])
                dp[j+1] += dp[j];
        }
    }
    cout << dp[3] << endl;

    return 0;
}