let solve s =
    let num_c = seq s |>
                Seq.filter (fun c -> c = 'c') |>
                Seq.length
    let num_w = seq s |>
                Seq.filter (fun c -> c = 'w') |>
                Seq.length
    if num_c - 1 < num_w then num_c - 1
    else num_w


let () =
  let s = stdin.ReadLine()
  solve s |> printfn "%d"