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Score : $100$ points

### 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.

### Constraints

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

### Input

Input is given from Standard Input in the following format:

$N$ $X$


### 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.