using System;

public class Program

{

    public static void Main()

    {

        int i=1;

        int j=1;

        while(i<=10)

        {

            if((i-1)!=0)

            {

                j=1;

                while(j<=(i-1))

                {

                    Console.Write("Y");

                    j++;

                }

            }

            while(j<=10)

            {

                Console.Write("X");

                j++;

            }

            Console.Write("\n");

            i++;

            j=1;

        }

    }

}