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