Problem M: 签到题

Problem M: 签到题

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 188  Solved: 150
Submit Status Web Board

Creator:

Description

恭喜你发现一道签到题,请输出“check in”来解决这道问题。

Input


Output

check in

Sample Input


Sample Output

check in

HINT

恭喜你,签到成功

SubmitStatus