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();
            long ans = 0;

            for (int i = 0; i < s.Length; i++)
            {
                if (!s[i].Equals('c')) continue;
                long w = s.Substring(i).Where(x => x.Equals('w')).Count();
                ans += w * (w - 1 ) / 2;
            }
            Console.WriteLine(ans);
        }
    }
}