def f1():
    for i in range(4):
        if i == 2:
            pass
        print(i)

def f2():
    for i in range(4):
        if i == 2:
            continue
        print(i)

def f3():
    for i in range(4):
        if i == 2:
            pass
        else:
            print(i)

def f4():
    for i in range(4):
        if i != 2:
            print(i)