Su-su-su-supernova

Time limit1sMemory limit1024 MB

Summary

Given a year N and its discovery order M, print the supernova name: SN, the year, then the order written as A to Z, followed by aa to zz.

Level: Easy2 of 10
Topics: Implementation, String
Solved: No attempts yet

Problem

사건은 다가와, ah-oh, ayy ♪♫

거세게 커져가, ah-oh, ayy ♫

That tick, that tick, tick bomb ♪

That tick, that tick, tick bomb ♪

감히 건드리지 못할 걸 (누구도 말이야) ♫

지금 내 안에선, su-su-su-supernova ♫♪

Supernova means 초신성 (超新星).

Supernovae have their own naming system. A supernova is named by combining SN, the abbreviation of Supernova, the year it was observed, and its observation order within that year written in Latin letters. The first 26 orders use uppercase A to Z. After that, orders use two lowercase letters such as aa, ab, and ac. Even if only one supernova is observed in a year, it is still labeled A. For example, SN 2014J is the 10th supernova observed in 2014, and SN 2011fe is the 161st supernova observed in 2011.

Given the year a supernova was discovered and its order of discovery that year, print the supernova's name.

Input

The first line contains two integers $N$ and $M$ , separated by a space. $N$ is the year, and $M$ is the order in which the supernova was discovered that year.

( $1\leq N\leq 3\ 000$ , $1\leq M\leq 702$ )

Output

Print the name of the given supernova on the first line.

Examples3

Example 1
Input
```
2014 10
```
Expected output
```
SN 2014J
```
Example 2
Input
```
2011 161
```
Expected output
```
SN 2011fe
```
Example 3
Input
```
1 1
```
Expected output
```
SN 1A
```