Hi, thanks for your work.
I don't quite understand the role of check5 in the evaluating process, it seems to bring some wrong results. Here is an example of 4496 test problem.
The question is:

My program is:

When I pass 22 into the program, the ideal return result is “Christmas Eve Eve Eve”, but this program returns “Christmas Eve”. Obviously, this is a wrong answer, but check5 in the “run_test” function judges the result as correct.

Is it a bug? Looking forward to your reply.