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

class Meguru
{

    public Meguru() { }
    public static int Main()
    {
        new Meguru().calc();
        return 0;
    }

    Scanner cin;

    //今日は2問目までしか解きませんよ！
    void calc()
    {
        cin = new Scanner();
        long[] dp = new long[4];
        dp[0] = 1;
        string s = cin.next();
        for (int i = 0; i < s.Length; i++)
        {
            if (s[i] == 'c')
            {
                dp[1] += dp[0];
            }
            else if (s[i] == 'w')
            {
                dp[3] += dp[2];
                dp[2] += dp[1];
            }
        }
        Console.WriteLine(dp[3]);
    }
}





class Scanner
{
    string[] s;
    int i;

    char[] cs = new char[] { ' ' };

    public Scanner()
    {
        s = new string[0];
        i = 0;
    }

    public string next()
    {
        if (i < s.Length) return s[i++];
        string st = Console.ReadLine();
        while (st == "") st = Console.ReadLine();
        s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
        i = 0;
        return next();
    }

    public int nextInt()
    {
        return int.Parse(next());
    }

    public long nextLong()
    {
        return long.Parse(next());
    }

    public double nextDouble()
    {
        return double.Parse(next());
    }

}