Building

using System;

namespace Building
{
    class Program
    {
        static void Main(string[] args)
        {
            int floors = int.Parse(Console.ReadLine());
            int apartments = int.Parse(Console.ReadLine());

            for(int i = floors; i >= 1; i--)
            {
                for(int j = 0; j < apartments; j++)
                {
                    if(i == floors )
                       Console.Write($"L{i}{j} ");
                    else
                    {
                        if(i % 2 == 1)
                            Console.Write($"A{i}{j} ");
                        else
                            Console.Write($"O{i}{j} ");
                    }
                }
                Console.WriteLine();
            }
        }
    }
}