import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test346 {

	public static void main(String[] args) {
		int result = 0;
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try {
			String str = br.readLine();
			char[] ch = str.toCharArray();
			Pattern pattern = Pattern.compile("c");
			for(int i=0;i<ch.length;i++){
				String s = String.valueOf(ch[i]);
				Matcher matcher = pattern.matcher(s);
				if(matcher.matches()){
					int count=0;
					for(int j=i+1;j<ch.length;j++){
						if(ch[j]=='w'){
							count++;
						}
					}
					result += count * (count - 1) / 2 ;
				}
			}
			System.out.println(result);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}