using System;
using System.Collections.Generic;
using System.Linq;

namespace yukicoder
{
	public class Program
	{
		public static void Main()
		{
			var c = Console.ReadLine();
			var sum = 0;
            if (c.Length > 2)
            {
				for (var i = 0; i < c.Length - 2; i++)
				{
                    if (c[i] == 'c')
                    {
						var w = 0;
						for(var j = i + 1; j < c.Length; j++)
                        {
                            if (c[j] == 'w')
                            {
								w++;
                            }
                        }
						sum += w * (w - 1) / 2;
                    }
				}
			}
			Console.WriteLine(sum);
		}
	}
}