Problem Description

Little M needs to write an essay.

• The essay must contain at least $a$ words and at most $b$ words.
• Each word must have at least $1$ letter and at most $15$ letters.
• The essay must contain at least $\dfrac{b}{2}$ distinct words.

Little M stayed up late last night doing Codeforces, so please help him write the essay.

The essay can only have one paragraph (only one line), and it may use only lowercase English letters and spaces.

Note: The meaning of the essay does not need to make sense, and the grammar does not need to be correct. Any essay that meets the requirements can get $\color{green}\texttt{AC}$.

Input Format

The first line contains two positive integers $a, b$.

Output Format

Output one line: an essay.

2 7

this shakespeare fella is good

Hint

Constraints

For $100\%$ of the testdata, $1 \le a, b \le 10^5$.

Notes

• Sample #2 and Sample #3 are too long to show, so they are placed here: Sample #2 and Sample #3.
• Translated from COCI 2015-2016 #3 B ESEJ, full score 80.
• Thanks to
  https://www.luogu.com.cn/user/60864
  ing checker.cpp.

Translated by ChatGPT 5