#coding=utf-8
'''
Created on 2016Äê11ÔÂ29ÈÕ

@author: zhao
'''
def add(a, b):
    c=[]
    for i in a:
        for j in b:
            c.append(i+j)
    return c

def multiply(a, b):
    c= []
    for i in a:
       for j in b:
           c.append(object) 