using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yukikoda
{
    class Program
    {
        static void Main(string[] args)
        {
            string s = Console.ReadLine();
            int ans = 0;

            for (int i = 0; i < s.Length; i++)
            {
                if (!s[i].Equals('c')) continue;
                int w = s.Substring(i).Where(x => x.Equals('w')).Count();
                ans += calc(w) / (2 * calc(w - 2));
            }
            Console.WriteLine("{0}", ans);
        }

        static int calc(int a)
        {
            int r = 1;
            for (int i = 1; i <= a; i++)
            {
                r *= i;
            }
            return r;
        }
    }
}