import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		char[] arr = sc.next().toCharArray();
		long cCount = 0;
		long cwCount = 0;
		long sum = 0;
		for (char c : arr) {
		    if (c == 'c') {
		        cCount++;
		    } else if (c == 'w') {
		        sum += cwCount;
		        cwCount += cCount;
		    }
		}
		System.out.println(sum);
	}
}