Score : $100$ points
In the Kingdom of AtCoder, there is a standardized test of competitive programming proficiency.
An examinee will get a score out of $100$ and obtain a rank according to the score, as follows:
Takahashi took this test and got $X$ points.
Find the minimum number of extra points needed to go up one rank higher. If, however, his rank was Expert, print
expert, as there is no higher rank than that.
Input is given from Standard Input in the following format:
Print the answer.
He got $56$ points and was certified as Intermediate. In order to reach the next rank of Advanced, he needs at least $14$ more points.
He got full points and was certified as Expert. There is no rank higher than that, so print