def addition(x, y):
    pass


def subtraction(x, y):
    pass


def multiplication(x, y):
    pass


def division(x, y):
    pass


def modulo(x, y):
    pass


def secondPower(x):
    pass


def power(x, y):
    pass


def secondRadix(x):
    pass


def magic(x, y, z, k):
    pass


def control(a, x, y, z, k):
    pass