770_A. New Password
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. 

Input

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.

Output

Print any password which satisfies all conditions given by Innokentiy.

Examples

Input

4 3


Output

java


Input

6 6


Output

python


Input

5 2


Output

phphp

Note

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. 
```python

n, k = eval(input().rstrip().replace(" ", ","))
k = min(k, 26)
letters = [chr(i) for i in range(97, 123)]
for i in range(n):
    print(letters[i%k], end="")
```