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

int solve(const string& S, const string& target) {
	vector<int> dp(target.size() + 1, 0);
	dp[0] = 1;
	for(char c : S){
		for(int i=target.size()-1;i>=0;--i){
			if(c == target[i]){
				dp[i+1] += dp[i];
			}
		}
	}
	return dp.back();
}

int main(){
	string S;
	cin >> S;
	cout << solve(S, "cww") << endl;
	return 0;
}