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.

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.