#include <bits/stdc++.h>
using namespace std;
#define rep(i, a) for (int i = 0; i < (a); i++)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) for (int i = (a) - 1; i >= 0; i--)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
template<class T1, class T2> bool chmin(T1 &a, T2 b) { return b < a && (a = b, true); }
template<class T1, class T2> bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
typedef long long ll;

int main() {
	string s;
	cin >> s;
	int n = s.size(); 

	static ll dp[101010][4];
	dp[0][0] = 1;

	rep(i, n) {
		dp[i + 1][0] += dp[i][0];
		dp[i + 1][1] += dp[i][1];
		dp[i + 1][2] += dp[i][2];
		dp[i + 1][3] += dp[i][3];
		if (s[i] == 'c') dp[i + 1][1] += dp[i][0];
		if (s[i] == 'w') dp[i + 1][2] += dp[i][1];
		if (s[i] == 'w') dp[i + 1][3] += dp[i][2];
	}

	cout << dp[n][3] << endl;
	
	return 0;
}