Problem Statement

Find the X-th character from the beginning of the string that is obtained by concatenating these characters: N copies of A's, N copies of B's, …, and N copies of Z's, in this order.

Input

Input is given from Standard Input in the following format:
N X

Output

Print the answer.

Constraints

• $1 \leq N \leq 100$
• $1 \leq X \leq N\times 26$
• All values in input are integers.

Sample Input 1

1 3

Sample Output 1

C

We obtain the string ABCDEFGHIJKLMNOPQRSTUVWXYZ, whose 3-rd character from the beginning is C.

Sample Input 2

2 12

Sample Output 2

F

We obtain the string AABBCCDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZ, whose 12-th character from the beginning is F.

见题面 Input 部分

见题面 Output 部分