# internal.py

def modulus_three(n):
    r = n % 3
    if r == 0:
        print("Multiple of 3")
    elif r == 1:
        print("Remainder 1")
    else:   # r == 2
        assert r == 2, "Remainder is not 2"
        print("Remainder 2 ")

def modulus_four(n):
    r = n % 4
    if r == 0:
        print("Multiple of 4")
    elif r == 1:
        print("Remainder 1")
    elif r == 2:
        print("Remainder 2")
    elif r == 3:
        print("Remainder 3")
    else:
        assert False, "This should never happen"
