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