#include <bits/stdc++.h>
using namespace std;
int dp[100010][4];
int main(){
	string s;	cin>>s;
	int n=s.size();
	dp[0][0]=1;
	for(int i=0;i<n;i++){
		if(s[i]=='c'){
			dp[i+1][1]+=dp[i][0];
		}
		else if(s[i]=='w'){
			dp[i+1][3]+=dp[i][2];
			dp[i+1][2]+=dp[i][1];
		}
		dp[i+1][3]+=dp[i][3];
		dp[i+1][2]+=dp[i][2];
		dp[i+1][1]+=dp[i][1];
		dp[i+1][0]+=dp[i][0];
	}
	cout<<dp[n][3]<<endl;
	return 0;
}