using System;

namespace No346{
    public class Program{
        public static void Main(string[] args){
            const string cww = "cww";

            var str = Console.ReadLine();
            var dp = new long[cww.Length + 1];
            dp[0] = 1;

            foreach(var c in str){
                for(var i = cww.Length; i > 0; i--) {
                    if(c == cww[i - 1]){
                        dp[i] += dp[i - 1];
                    }
                }
            }

            Console.WriteLine(dp[cww.Length]);
        }
    }
}