package main

import "fmt"

func main() {
	var s string
	fmt.Scanf("%s", &s)
	total := 0
	for i := 0; i < len(s); i++ {
		if s[i] == 'c' {
			countW := 0
			for j := i + 1; j < len(s); j++ {
				if s[j] == 'w' {
					countW += 1
				}
			}
			total += countW * (countW - 1) / 2
		}
	}
	fmt.Println(total)
}