using System;

public class Program

{

    public static void Main()

    {

​

for (int i = 5; i >= 1; i--)

{

    for (int j = i; j >= 1; j--)

    {

        Console.Write(j);

    }

    for (int j = 2; j <= i; j++)

    {

        Console.Write(j);

    }

    Console.WriteLine();

}

    }

}