from itertools import product

variables_amount = 3
variants = [0, 1]
truth_table = list(product(variants, repeat=variables_amount))


def f(x, y, z):
    return not(x or y ) or (z == x)



print("x", "y", "z", " f")
for row in truth_table:
    result = f(*row)
    if result == 0:
        print(*row, f(*row))