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

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

    Scanner cin;

    void calc()
    {
        cin = new Scanner();
        string S = cin.next();
        int ans = Math.Max(0, S.Length - 2);
        int start = 0;
        for (int i = 2; i < S.Length; i++)
        {
            if(S[i - 2] == 'c' && S[i-1] == 'c' && S[i] == 'w')
            {
                start = i - 1;
            }
            ans = Math.Min(ans, start + (S.Length - 1 - i));
        }
        Console.WriteLine(ans);

    }
}


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());
    }

}