using System;

class Program
{
    static void Main()
    {
        string[] s = Console.ReadLine()!.Split();
        int a = s[0] == "?" ? -1 : int.Parse(s[0]);
        int b = s[1] == "?" ? -1 : int.Parse(s[1]);
        int c = s[2] == "?" ? -1 : int.Parse(s[2]);

        string ans = "";

        foreach (int x in new int[] { 1, 4 })
        {
            int A = a == -1 ? x : a;
            int B = b == -1 ? x : b;
            int C = c == -1 ? x : c;

            if (A != B && B != C && A != C && (B == Math.Max(A, Math.Max(B, C)) || B == Math.Min(A, Math.Min(B, C))))
            {
                ans += x;
            }
        }

        Console.WriteLine(ans);
    }
}