CF770A.New Password

普及/提高-

通过率：0%

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题目描述

Innokentiy decides to change the password in the social net "Contact!", but he is too lazy to invent a new password by himself. That is why he needs your help.

Innokentiy decides that new password should satisfy the following conditions:

the length of the password must be equal to $n$ ,
the password should consist only of lowercase Latin letters,
the number of distinct symbols in the password must be equal to $k$ ,
any two consecutive symbols in the password must be distinct.

Your task is to help Innokentiy and to invent a new password which will satisfy all given conditions.

输入格式

The first line contains two positive integers $n$ and $k$ ( $2<=n<=100$ , $2<=k<=min(n,26)$ ) — the length of the password and the number of distinct symbols in it.

Pay attention that a desired new password always exists.

输出格式

Print any password which satisfies all conditions given by Innokentiy.

输入输出样例

输入#1
```
4 3
```
输出#1
```
java
```
输入#2
```
6 6
```
输出#2
```
python
```
输入#3
```
5 2
```
输出#3
```
phphp
```

说明/提示

In the first test there is one of the appropriate new passwords — java, because its length is equal to $4$ and $3$ distinct lowercase letters a, j and v are used in it.

In the second test there is one of the appropriate new passwords — python, because its length is equal to $6$ and it consists of $6$ distinct lowercase letters.

In the third test there is one of the appropriate new passwords — phphp, because its length is equal to $5$ and $2$ distinct lowercase letters p and h are used in it.

Pay attention the condition that no two identical symbols are consecutive is correct for all appropriate passwords in tests.

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