package main

import (
  "bufio"
  "fmt"
  _ "math"
  _ "math/big"
  "os"
  _ "strconv"
  _ "strings"
)

var rdr = bufio.NewReaderSize(os.Stdin, 10000000)

func gets() string {
  buf := make([]byte, 0, 10000000)
  for {
    l, p, _ := rdr.ReadLine()
    buf = append(buf, l...)
    if !p {
      break
    }
  }
  return string(buf)
}
func main() {
  text := gets()
  c := 0
  w := 0
  for _, ch := range text {
    if string(ch) == "c" {
      c += 1
    }
    if string(ch) == "w" {
      w += 1
    }
  }
  if c-1 > w {
    fmt.Println(w)
  } else {
    fmt.Println(c - 1)
  }
}