package main

import (
	"bufio"
	"fmt"
	"io"
	"os"
)

func solve(in io.Reader, out, err io.Writer) {
	c, w, str := 0, 0, []byte{}
	fmt.Fscan(in, &str)

	for i := range str {
		if str[i] == 'c' {
			c++
		} else {
			w++
		}
	}
	if c-1 < w {
		fmt.Fprintln(out, c-1)
	} else {
		fmt.Fprintln(out, w)
	}

}

func main() {
	br := bufio.NewReaderSize(os.Stdin, int(1e4))
	solve(br, os.Stdout, os.Stderr)
}