#define _USE_MATH_DEFINES
#include<bits/stdc++.h>
using namespace std;

#define int long long

const int O = 1;

string S;
int sumC[100001], sumW[100001];

signed main()
{
	cin >> S;
	int ans = 0;
	for (int i = 0; i < S.size(); i++) sumC[i] = sumC[i - 1] + (S[i] == 'c');
	for (int i = S.size() - 1; i >= 0; i--) sumW[i] = sumW[i + 1] + (S[i] == 'w');
	for (int i = 1; i < S.size() - 1; i++) if (S[i] == 'w') ans += sumC[i - 1]*sumW[i + 1];
	printf("%lld\n", ans);
	return 0;
}