#include <iostream>
using namespace std;
long long dp[100000][3];
int main(){
    string s;cin>>s;
    if(s[0] == 'c')dp[0][0] = 1;
    for(int i = 1; s.size() > i; i++){
        dp[i][0] = dp[i-1][0] + (s[i]=='c'?1LL:0LL);
        dp[i][1] = dp[i-1][1] + (s[i]=='w'?dp[i-1][0]:0LL);
        dp[i][2] = dp[i-1][2] + (s[i]=='w'?dp[i-1][1]:0LL);
    }
    cout << dp[s.size()-1][2] << endl;
}