#include <iostream>
#include <string>
long a[100010];
using namespace std;
int main()
{
    string s;
    cin>>s;
    int n=s.size();
    for(int i=0; i<n; ++i) a[n-i-1]=a[n-i]+(s[n-i-1]=='w');

    long res=0;
    for(int i=0; i<n; ++i)
        if (s[i]=='c')
            res+=a[i]*(a[i]-1)/2;

    cout<<res<<endl;
}