package no346;

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		char[] s = sc.next().toCharArray();
		int n = s.length;
		long ans = 0;
		long[][] dp = new long[2][n+1];
		for(int i=0;i<n;i++) {
			if (s[i] == 'c') {
				dp[0][i+1] += 1;
			}else if(s[i] == 'w') {
				dp[1][i+1] = dp[0][i];
				ans += dp[1][i];
			}
			dp[0][i+1] += dp[0][i];
			dp[1][i+1] += dp[1][i];
		}
		System.out.println(ans);
	}

}