using System;

namespace Yukicoder
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var cw = Console.ReadLine();
            int len = cw.Length;
            int c = 0;
            int w = 0;
            for (int i = 0; i < len; i++)
            {
                if (cw[i] == 'c')
                {
                    c++;
                }
                else
                {
                    w++;
                }
            }

            Console.WriteLine(
                c - 1 > 0 && w > 0 ? Math.Min(c - 1, w) : 0
                );

        }
    }
}