using System;

public class Program

{

    public static bool solve(string str1, string str2, string str3)

    {

        int m = str1.Length;

        int n = str2.Length;

        if (str3.Length != m+n)

            return false;

        var match = new bool[m+1, n+1];

        for (int i = m; i >= 0; i--)

        {

            for (int j = n; j >= 0; j--)

            {

                match[i,j] = (i == m && j == n) ||

                             (i < m && str1[i] == str3[i+j] && match[i+1,j]) ||

                             (j < n && str2[j] == str3[i+j] && match[i,j+1]);

            }

        }

        return match[0,0];

    }

    public static void Main()

    {

        Console.WriteLine("version 8");

        Console.WriteLine(solve("124", "53", "12345"));

    }

}