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:
Your task is to help Innokentiy and to invent a new password which will satisfy all given conditions.
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.
Print any password which satisfies all conditions given by Innokentiy.
4 3
java
6 6
python
5 2
phphp
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.