#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <numeric>
#include <functional>
#include <cmath>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <sstream>
#include <string>
#define repd(i,a,b) for (int i=(int)(a);i<(int)(b);i++)
#define rep(i,n) repd(i,0,n)
#define all(x) (x).begin(),(x).end()
#define mod 1000000007
#define inf 2000000007
#define mp make_pair
#define pb push_back
typedef long long ll;
using namespace std;
template <typename T>
inline void output(T a, int p) {
    if(p) cout << fixed << setprecision(p)  << a << "\n";
    else cout << a << "\n";
}
// end of template

int main() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    // source code
    string S;
    cin >> S;
    int sz = (int)S.size();
    
    vector<vector<ll>> dp(sz, vector<ll>(3, 0));
    if (S[0] == 'c') {
        dp[0][0] = 1;
    }
    repd(i, 1, sz){
        rep(j, 3){
            dp[i][j] = dp[i - 1][j];
        }
        if (S[i] == 'c') dp[i][0]++;
        if (S[i] == 'w') {
            dp[i][1] += dp[i - 1][0];
            dp[i][2] += dp[i - 1][1];
        }
    }
    output(dp[sz - 1][2], 0);
    return 0;
}