<gh_stars>0
__author__ = 'wnduan'

import itertools

helo(itertools)

#
# NAME = 'Duan'
# name = 'Weining'
# a = 2
# b = 3
#
# def show_name():
#     print NAME
#     print name
#     a = a + b
#     print c
#
# if __name__ == '__main__':
#     show_name()