def zad_a():
    for k in range(-4, 15, 3):
        print(k)

def zad_b():
    for k in range(-4, 15, 3):
        if k != 2 and k != 8:
            print(k)

def zad_c():
    for k in range(12, -13, -4):
        print(k)

def zad_d():
    for k in range(12, -13, -4):
        if k != 0:
            print(k)

zad_a()
print()
zad_b()
print()
zad_c()
print()
zad_d()
