#include <iostream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <queue>

#include <map>
#include <set>
#include <string>
#include <algorithm>
#include <functional>
using namespace std;
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
#define INF 1<<30
#define ALEN(ARR) (sizeof(ARR) / sizeof((ARR)[0]))
#define MP make_pair
#define mp make_pair
#define pb push_back
#define PB push_back
#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define ll long long
#define ull unsigned long long
#define MOD 1000000007

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	cout.precision(16);
	
	string s;
	cin >> s;
	
	vector<int> cv;
	int wc = 0, cllen = 0;
	
	int slen = s.size();
	REP(i, slen) {
		char c = s[i];
		if(c == 'c') {
			cv.pb(0);
			cllen += 1;
			continue;
		}
		if(c == 'w') {
			int clen = cv.size();
			REP(j, clen) {
				cv[j] += 1;
			}
		}
	}
	
	ll res = 0;
	for(auto i : cv) {
		if(i < 2) {
			break;
		}
		res += (i * (i - 1)) / 2;
	}
	
	cout << res << endl;

}