You have a digit sequence S of length 4. You are wondering which of the following formats S is in:

* YYMM format: the last two digits of the year and the two-digit representation of the month (example: `01` for January), concatenated in this order
* MMYY format: the two-digit representation of the month and the last two digits of the year, concatenated in this order



If S is valid in only YYMM format, print `YYMM`; if S is valid in only MMYY format, print `MMYY`; if S is valid in both formats, print `AMBIGUOUS`; if S is valid in neither format, print `NA`.

Constraints

* S is a digit sequence of length 4.

Input

Input is given from Standard Input in the following format:


S


Output

Print the specified string: `YYMM`, `MMYY`, `AMBIGUOUS` or `NA`.

Examples

Input

1905


Output

YYMM


Input

0112


Output

AMBIGUOUS


Input

1700


Output

NA

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int input = sc.nextInt();
		
		int aa = input / 100;
		int bb = input % 100;
		
		boolean yymm = false;
		boolean mmyy = false;
		
		if(aa >= 1 && aa <= 12) {
			mmyy = true;
		}
		
		if(bb >= 1 && bb <= 12) {
			yymm = true;
		}
		
		if(yymm && mmyy) {
			System.out.println("AMBIGUOUS");
		}
		else if(yymm && !mmyy) {
			System.out.println("YYMM");
		}
		else if(!yymm && mmyy) {
			System.out.println("MMYY");
		}
		else {
			System.out.println("NA");
		}
	}

}
