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) {
	Scanner sc=new Scanner(System.in);

	String S=sc.next();
	int A=Integer.valueOf(S.substring(0,2));
	int B=Integer.valueOf(S.substring(2));
	boolean a1=(A>=1&&A<=12);
	boolean b1=(B>=1&&B<=12);
	
	if(a1&&b1) {
		System.out.println("AMBIGUOUS");
		
	}else if(!a1&&b1) {
		System.out.println("YYMM");
		
		
	}else if(a1&&!b1) {
		System.out.println("MMYY");
		
	}else if(!a1&&!b1) {
		System.out.println("NA");
		
	}
	
		
	}
	

	
}
		