import random


def roll(sides):
    return random.randrange(1, sides)


for b in ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L"]:
    for x in range(1, 51):
        print("{}{:01}".format(b, x), end="")
        for y in range(1, 7):
            for z in range(roll(8)):
                print("☐", end="")
            print(y, end="")
        print()