#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <functional>
#include <set>
#include <ctime>
#include <random>
using namespace std;
template<typename T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;}
template<typename T> istream& operator , (istream& is, T& val){ return is >> val;}
template<typename T> ostream& operator << (ostream& os, const vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"\n":" ");return os;}
template<typename T> ostream& operator , (ostream& os, T& val){ return os << " " << val;}
template<typename T> ostream& operator >> (ostream& os, T& val){ return os << " " << val;}

using namespace std;

int main(){
	string s;
	cin >> s;
	vector<long long> dp(3, 0);
	for(int i=0; i<s.size(); i++){
		auto dp_ = dp;
		if(s[i] == 'c') dp_[0]++;
		if(s[i] == 'w'){
			dp_[1]+=dp[0];
			dp_[2]+=dp[1];
		}
		swap(dp, dp_);
	}
	cout << dp[2] << endl;
	return 0;
}