Building

import java.util.Scanner;

public class Building {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Integer floors = Integer.parseInt(scanner.nextLine());
        Integer rooms = Integer.parseInt(scanner.nextLine());


        for(int i = floors; i >= 1; i--){
            if(floors == 1 || i == floors){
                Integer decRooms = rooms;
                for(decRooms = 0; decRooms < rooms; decRooms++){
                    System.out.printf("L%d%d ",i,decRooms);
                }
                System.out.println();
            }else if(i % 2 == 0){
                Integer decRooms = rooms;
                for(decRooms = 0; decRooms < rooms; decRooms++){
                    System.out.printf("O%d%d ",i,decRooms);
                }
                System.out.println();
            }else {
                Integer decRooms = rooms;
                for(decRooms = 0; decRooms < rooms; decRooms++){
                    System.out.printf("A%d%d ",i,decRooms);
                }
                System.out.println();
            }
        }
    }
}