import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class QuestionA {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String line;

		try{
			line = in.readLine();
		}catch(IOException e){
			System.out.println("0");
			return;
		}

		int[] c = new int[100000];
		Arrays.fill(c, 0);

		int result = 0;
		int ccount = 0;//直前のcの位置

		for(int i = 0; i < line.length(); i++){
			if(line.charAt(i) == 'c')
				ccount++;
			if(line.charAt(i) == 'w'){
				for(int j = 0; j < ccount; j++)
					c[j]++;
			}
		}
		for(int i = 0; i < ccount; i++){
			result += c[i] * (c[i]-1)/2;
		}


		System.out.println(result);
	}

}