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

partial class Solver
{
    bool CheckA(int[] hist, int count)
    {
        if (count == 2)
        {
            foreach (var h in hist)
            {
                if (h == 2) return true;
            }
            return false;
        }
        else
        {
            for (int index = 1; index <= 9; index++)
            {
                if (hist[index] == 0) continue;
                if (hist[index] >= 3)
                {
                    hist[index] -= 3;
                    if (CheckA(hist, count - 3))
                    {
                        hist[index] += 3;
                        return true;
                    }
                    hist[index] += 3;
                }
                if (index + 2 <= 9 && hist[index] > 0 && hist[index + 1] > 0 && hist[index + 2] > 0)
                {
                    hist[index]--;
                    hist[index + 1]--;
                    hist[index + 2]--;
                    if (CheckA(hist, count - 3))
                    {
                        hist[index]++;
                        hist[index + 1]++;
                        hist[index + 2]++;
                        return true;
                    }
                    hist[index]++;
                    hist[index + 1]++;
                    hist[index + 2]++;
                }
            }
        }
        return false;
    }
    bool CheckB(int[] hist)
    {
        return hist.All(h => h == 0 || h == 2);
    }

    public void Run()
    {
        var S = ns();
        var hist = new int[10];
        foreach (var c in S)
        {
            hist[c - '0']++;
        }
        for (int d = 1; d <= 9; d++)
        {
            if (hist[d] == 4) continue;
            hist[d]++;
            if (CheckA(hist, S.Length + 1) || CheckB(hist))
            {
                cout.WriteLine(d);
            }
            hist[d]--;
        }
    }
}


// PREWRITEN CODE BEGINS FROM HERE
partial class Solver : Scanner
{
    public static void Main(string[] args)
    {
        new Solver(Console.In, Console.Out).Run();
    }

    TextReader cin;
    TextWriter cout;

    public Solver(TextReader reader, TextWriter writer)
        : base(reader)
    {
        this.cin = reader;
        this.cout = writer;
    }
    public Solver(string input, TextWriter writer)
        : this(new StringReader(input), writer)
    {
    }

    public int ni() { return NextInt(); }
    public int[] ni(int n) { return NextIntArray(n); }
    public long nl() { return NextLong(); }
    public long[] nl(int n) { return NextLongArray(n); }
    public double nd() { return NextDouble(); }
    public string ns() { return Next(); }
}

public class Scanner
{
    private TextReader Reader;
    private Queue<String> TokenQueue = new Queue<string>();
    private CultureInfo ci = CultureInfo.InvariantCulture;

    public Scanner()
        : this(Console.In)
    {
    }

    public Scanner(TextReader reader)
    {
        this.Reader = reader;
    }

    public int NextInt() { return Int32.Parse(Next(), ci); }
    public long NextLong() { return Int64.Parse(Next(), ci); }
    public double NextDouble() { return double.Parse(Next(), ci); }
    public string[] NextArray(int size)
    {
        var array = new string[size];
        for (int i = 0; i < size; i++) array[i] = Next();
        return array;
    }
    public int[] NextIntArray(int size)
    {
        var array = new int[size];
        for (int i = 0; i < size; i++) array[i] = NextInt();
        return array;
    }

    public long[] NextLongArray(int size)
    {
        var array = new long[size];
        for (int i = 0; i < size; i++) array[i] = NextLong();
        return array;
    }

    public String Next()
    {
        if (TokenQueue.Count == 0)
        {
            if (!StockTokens()) throw new InvalidOperationException();
        }
        return TokenQueue.Dequeue();
    }

    public bool HasNext()
    {
        if (TokenQueue.Count > 0)
            return true;
        return StockTokens();
    }

    private bool StockTokens()
    {
        while (true)
        {
            var line = Reader.ReadLine();
            if (line == null) return false;
            var tokens = line.Trim().Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            if (tokens.Length == 0) continue;
            foreach (var token in tokens)
                TokenQueue.Enqueue(token);
            return true;
        }
    }
}