2858: ABC126B - YYMM or MMYY

Memory Limit：128 MB Time Limit：1.000 S
Judge Style：Text Compare Creator：
Submit：16 Solved：9

Description

Problem Statement

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

Input is given from Standard Input in the following format: 

S

Output

Output

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

Sample Input Copy 

1905

Sample Output Copy 

YYMM

Source/Category

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