Score : $100$ points

Problem Statement

You are given a string $S$ ending with er or ist. If $S$ ends with er, print er; if it ends with ist, print ist.

Constraints

• $2 \le |S| \le 20$
• $S$ consists of lowercase English letters.
• $S$ ends with er or ist.

Input

Input is given from Standard Input in the following format:

$S$

Output

Print the answer.

atcoder

er

$S=$"atcoder" ends with er.

tourist

ist

er

er