using System;
using System.Collections.Generic;
using static System.Console;
using System.Linq;

class yuki321
{
    static int NN => int.Parse(ReadLine());
    static string[] SList(int n) => Enumerable.Repeat(0, n).Select(_ => ReadLine()).ToArray();
    static void Main()
    {
        var n = ReadLine();
        var list = new List<int>();
        foreach (var ni in n)
        {
            list.AddRange(ToBin(ni - 'A' + 10));
        }
        var counts = new int[8];
        for (var e = list.Count; e > 0; e -= 3)
        {
            var s = Math.Max(0, e - 3);
            ++counts[FromBin(list.Skip(s).Take(e - s).ToList())];
        }
        var res = new List<int>();
        var maxcount = counts.Max();
        for (var i = 0; i < counts.Length; ++i) if (counts[i] == maxcount) res.Add(i);
        WriteLine(string.Join(" ", res));
    }
    static List<int> ToBin(int a)
    {
        var list = new List<int>();
        var tmp = a;
        for (var i = 0; i < 4; ++i)
        {
            list.Add(tmp % 2);
            tmp >>= 1;
        }
        list.Reverse();
        return list;
    }
    static int FromBin(List<int> list)
    {
        var num = 0;
        foreach (var li in list)
        {
            num <<= 1;
            num += li;
        }
        return num;
    }
}