using System.IO;
using System;

class Program
{
    static void Main()
    {
        int val = 5;
        int i, j;
        for (i = 1; i <= val; i++) {
            for (j = 1; j <= i; j++) {
                Console.Write(j);
            }
            for (j = j - 2; j >= 1; j--) {
                Console.Write(j);
            }
            Console.WriteLine("");
        }
        Console.ReadLine();
    }
}