using System;
using System.Linq;

namespace No443
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var N = Console.ReadLine().Select(c => c - '0').Where(x => x != 0).ToArray();

            for (var i = 1; i <= 9; i++)
            {
                if (N.Any(x => x != i)) continue;
                Console.WriteLine(string.Join("", N));
                return;
            }

            var ans = 1;
            for (var sum = N.Sum(); sum % 3 == 0; sum /= 3) ans *= 3;
            if (N.All(x => x % 4 == 0)) ans *= 4;
            else if (N.All(x => x % 2 == 0)) ans *= 2;
            Console.WriteLine(ans);
        }
    }
}