Contest: Task: Related: TaskB

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:

- Novice, for a score not less than $0$ but less than $40$;
- Intermediate, for a score not less than $40$ but less than $70$;
- Advanced, for a score not less than $70$ but less than $90$;
- Expert, for a score not less than $90$.

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.

- $0 \leq X \leq 100$
- $X$ is an integer.

Input is given from Standard Input in the following format:

$X$

Print the answer.

56

14

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.

32

8

0

40

100

expert

He got full points and was certified as Expert. There is no rank higher than that, so print `expert`

.