#!/usr/bin/python


def f1(x,y):
    x = x * 1
    y = y * 2
    print x, y

def f2(x,y):
    x = x * 1
    y[0] = y[0] * 2
    print x, y

a = 0
b = [1,2]
f1(a,b)
print a, b
f2(a,b)
print a, b