import java.util.*;

public class Exercise30{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    String str = sc.next();
    char[] charArray = str.toCharArray();

    int count = 0;

    for (int a = 0; a < charArray.length; a++){

      if (charArray[a] == 'c'){
        for (int b = a + 1; b < charArray.length; b++){
          if (charArray[b] == 'w'){
            for (int c = b + 1; c < charArray.length; c++){
              if (charArray[c] == 'w'){
                count++;
              }
            }
          }
        }
      }
    }

    System.out.println(count);
  }
}