#!/usr/bin/evn python
#encoding=utf-8
#Author:canxue

a=5
b=6
# print(a,b)
b,a=a,b
# print(a,b)

a=['canxue','shi',['hahha','fdsfds'],'ren']
#print(' '.join(a))

a='abcdklgjfk'
# print(a[::-1])

a=[1,2,3,4]
b=a.copy()
print(a,b)
b[2]=10
print(a,b)



