import java.util.Scanner;
public class Chiwawa {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner s = new Scanner(System.in);
		StringBuilder str = new StringBuilder(s.nextLine());
		s.close();
		int all = 0;
		while(str.indexOf("c") != -1){
			int t = str.indexOf("c");
			int count = 0;
			for(int i = t;i < str.length();i++){
				if(str.charAt(i) == 'w'){
					count++;
				}
			}
			all += Combination(count,2);
			str.deleteCharAt(t);
		}
		System.out.println(all);

	}
	static int Combination(int r,int q){
		int rCq = 1;
		for(int i = 1;i <= q;i++){
			rCq = rCq * r-- / i;
		}
		return rCq;
	}

}