package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func main() {
	s := readLine()
	wc := strings.Count(s, "w")

	t := 0
	for _, v := range s {
		if v == 'w' {
			wc--
		}

		if v != 'c' {
			continue
		}
		t += ncr(wc, 2)
	}
	fmt.Println(t)
}

func ncr(n, r int) int {
	if n < 0 || r < 0 || r > n {
		return 0
	}
	k := r
	if k > n/2 {
		k = n - r
	}

	ret := int(1)
	for i := int(1); i <= k; i++ {
		ret *= n - i + 1
		ret /= i
	}
	return ret
}

func readLine() string {
	buf := make([]byte, 0, 1000000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}