06. Building

flours = int(input())
rooms = int(input())

for flour in range(flours, 0, -1):
    for room in range(0, rooms):
        if flour == flours:
            print(f"L{flour}{room} ", end="")
        elif flour % 2 == 0:
            print(f"O{flour}{room} ", end="")
        else:
            print(f"A{flour}{room} ", end="")
    print()