using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApp40

{

    class Program

    {

        static void Main(string[] args)

        {

            string s = Console.ReadLine();

​

            string s1 = Console.ReadLine();

            string s2 = Console.ReadLine();

            int[] x5 =s1.Split(' ').Select(int.Parse).ToArray();

            int[] x6 = s2.Split(' ').Select(int.Parse).ToArray();

            int[] answer = new int[((x5.Length * x5.Length)*2)];

            int count = -1;

            for ( int i = 0; i < x5.Length;i++)

            {

                for ( int z = 0; z < x6.Length;z++)

                {

                    count++;

                    answer[count] =Convert.ToInt32( x5[i].ToString() + x6[z].ToString());

                    Console.WriteLine(answer[count]);

                }

            }

            for (int i = 0; i < x6.Length; i++)

            {

                for (int z = 0; z < x5.Length; z++)

                {

                    count++;

                    answer[count] = Convert.ToInt32(x6[i].ToString() + x5[z].ToString());

                    Console.WriteLine(answer[count]);

                }

            }

​

            Console.WriteLine(answer.Min());

​

​

            Console.ReadKey();

        }

    }

}

​