import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String S = sc.next();
		
		char[] charS = S.toCharArray();
		
		int cnt = 0;
		
		for(int i = 0; i < S.length(); i++) {
			if(charS[i] == 'c') {
				for(int j = i + 1; j < S.length(); j++) {
					if(charS[j] == 'w') {
						for(int k = j + 1; k < S.length(); k++) {
							if(charS[k] == 'w') {
								cnt++;
							}
						}
					}
				}	
			}
		}
		
		System.out.println(cnt);
	}
}