24798번 - The Weight Of Words 스페셜 저지다국어

문제

Justin likes to play a game called "Weight of Words." In this game, a player must find words of a given length and a given weight. The weight of a word is the sum of the weights of its letters. Letters are English lowercase characters from 'a' to 'z' and have weights from 1ドル \ldots 26$.

You are asked to write an AI that can play this game!

입력

The input consists of a single line with two integers $l$ (0ドル < l \le 40$) and $w$ (0ドル < w \le 1000$).

출력

Output a string of length $l$ with weight $w$ consisting of lowercase English letters if it exists, otherwise output impossible. If more than one string exists, you may output any of them.

제한

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