import re
import time


def main():
    # print('[{}] Hello world!'.format(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time()))))
    str = '15555555555'
    n = len(str)
    new_str = str[0:int(n/3)] +re.sub(r'.', '*', str[int(n/3):int(n*2/3)]) + str[int(n*2/3):]
    print(new_str)


# 程序入口
if __name__ == '__main__':
    main()