# -*- coding:utf-8 -*-

def printInfo(num):
    print('**********************************************   %d   ***********************************************' % num)

printInfo(1)
str001 = 'I Love Python !'
print str001[0]
print str001[-1]

printInfo(2)
str002 = '123456789'
print str002[0:5]
print str002[-1]

printInfo(3)
print "+".join('aaaaaaaaa')

printInfo(4)
list = {'a','b','c'}
print '+'.join(list)
for a in list:
    print a