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
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
	ll a=0,b=0;
	ll n;
	cin>>n;
	ll m=n/100;
	n%=100;
	if(1<=m&&m<=12)a=1;
	if(1<=n&&n<=12)b=1;
	string ans;
	if(a&&b)ans="AMBIGUOUS";
	if(!a&&b)ans="YYMM";
	if(a&&!b)ans="MMYY";
	if(!a&&!b)ans="NA";
	cout<<ans<<endl;
	return 0;
}
