13122023_2

number = int(input("Введите размер клеточки: "))

for i in range(3):
    for j in range(4):
        print("*" * number + "_" * number, end="")
    print()

for i in range(3):
    for j in range(4):
        print("_" * number + "*" * number, end="")
    print()