module Yuki

open System

let solve (str : string) =
    let chars = str.ToCharArray()
    let cntChar target = Array.where (fun c -> c = target) >> Array.length
    let cntC = chars |> cntChar 'c'
    let cntW = chars |> cntChar 'w'
    min (cntC - 1) cntW

let S = Console.ReadLine()

S
|> solve
|> Console.WriteLine