Problem:
 Score : 200 points    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 is given from Standard Input in the following format:  S       Output Print the specified string: YYMM , MMYY , AMBIGUOUS or NA .        Sample Input 1 1905      Sample Output 1 YYMM  May XX19 is a valid date, but 19 is not valid as a month. Thus, this string is only valid in YYMM format.       Sample Input 2 0112      Sample Output 2 AMBIGUOUS  Both December XX01 and January XX12 are valid dates. Thus, this string is valid in both formats.       Sample Input 3 1700      Sample Output 3 NA  Neither 0 nor 17 is valid as a month. Thus, this string is valid in neither format.

Solution (Python):
def isyymm(s0,s1,s2,s3):
    if s2 == 0:
        if s3 in range(1,10):
            return 1
    elif s2 == 1:
        if s3 in range(3):
            return 1
    else:
        return 0

def ismmyy(s0,s1,s2,s3):
    if s0 == 0:
        if s1 in range(1,10):
            return 1
    elif s0 == 1:
        if s1 in range(3):
            return 1
    else:
        return 0

S = input()
s = [int(i) for i in S]

if isyymm(*s) == 1:
    if ismmyy(*s) == 1:
        print('AMBIGUOUS')
    else:
        print('YYMM')
else:
    if ismmyy(*s) == 1:
        print('MMYY')
    else:
        print('NA')

Solution (Python):
S = input()
mae = int(S[0:2])
ushiro = int(S[2:4])
flg = 3
 
if 1 <= mae <= 12 :
	flg -= 2
if 1 <= ushiro <= 12 :
	flg -= 1
if flg == 3:
	print('NA')
elif flg == 2:
	print('YYMM')
elif flg == 1:
	print('MMYY')
elif flg == 0:
	print('AMBIGUOUS')

Solution (Python):

s = input()
pre = s[:2]
suf = s[2:]


def is_yy(s):
    return s <= "00" or "13" <= s


if is_yy(pre) and is_yy(suf):
    print("NA")
elif is_yy(pre) and not is_yy(suf):
    print("YYMM")
elif not is_yy(pre) and is_yy(suf):
    print("MMYY")
else:
    print("AMBIGUOUS")

Solution (Python):
S = int(input())

A = int(S/100)
B = S%100

if 1<=A<= 12:
    if 1<=B<=12:
        print('AMBIGUOUS')
    else:
        print('MMYY')
else:
    if 1<=B<=12:
        print('YYMM')
    else:
        print('NA')

Solution (Python):


def main():
	s = input()
	first = int(s[:2])
	second = int(s[2:])

	if (first >= 13 or first == 00) and (second >= 13 or second == 00):
		print("NA")
	elif first >= 13 or first == 00:
		print("YYMM")
	elif second >= 13 or second == 00:
		print("MMYY")
	else:
		print("AMBIGUOUS")


if __name__ == "__main__":
	main()

Solution (Python):
s = input()
yy = int(s[:2])
mm = int(s[2:])
if  0 < yy <= 12 and 0 < mm <= 12:
    print("AMBIGUOUS")
elif 0 < yy <= 12:
    print("MMYY")
elif 0 < mm <= 12:
    print("YYMM")
else:
    print("NA")

Solution (Python):
S = str(input())

s0 = int(S[:2])
s1 = int(S[2:])

if s0 <= 12 and s0 >= 1 and s1 <= 12 and s1 >= 1:
    print('AMBIGUOUS')
elif s0 <= 12 and s0 >= 1:
    print('MMYY')
elif s1 <= 12 and s1 >= 1:
    print('YYMM')
else:
    print('NA')

Solution (Python):
s = input()

s_under = int(s[2:]) 
s_upper = int(s[:2]) 

if 1 <= s_under <=12 and 1<=s_upper<=12:
    print("AMBIGUOUS")
elif 1 <= s_under <=12:
    print("YYMM")
elif 1 <= s_upper <=12:
    print("MMYY")
else:
    print("NA")

Solution (Python):
S = input()

a = int(S[:2])
b = int(S[2:])
a = True if a>0 and a<13 else False
b = True if b>0 and b<13 else False

if a and b:
  str = 'AMBIGUOUS'
elif a and not b:
  str = 'MMYY'
elif not a and b:
  str = 'YYMM'
else:
  str = 'NA'
  
print(str)

Solution (Python):
S = input()
T = str(S)
A=int(T[0:2])
B=int(T[2:4])
if 1<=A<=12:
  if 1<=B<=12:
    print('AMBIGUOUS')
  else:
    print('MMYY')
elif 1<=B<=12:
    print('YYMM')
else:
    print('NA')

Solution (Python):
S = input()
T = str(S)
A=int(T[0:2])
B=int(T[2:4])
if 1<=A<=12:
  if 1<=B<=12:
    print('AMBIGUOUS')
  else:
    print('MMYY')
else:
  if 1<=B<=12:
    print('YYMM')
  else:
    print('NA')

Solution (Python):
def is_MMYY(xx, yy):
    if (xx >= 1) and (xx <= 12):
        return True
    return False

def is_YYMM(xx, yy):
    if (yy >= 1) and (yy <= 12):
        return True
    return False

S = list(input())

xx = int("".join(S[:2]))
yy = int("".join(S[2:]))

if is_MMYY(xx, yy) and is_YYMM(xx, yy):
    print("AMBIGUOUS")
elif is_MMYY(xx, yy):
    print("MMYY")
elif is_YYMM(xx, yy):
    print("YYMM")
else:
    print("NA")

Solution (Python):
s = input()
a = 0 < int(s[:2]) <= 12
b = 0 < int(s[2:]) <= 12

if a:
    if b:
        print('AMBIGUOUS')
    else:
        print('MMYY')
else:
    if b:
        print('YYMM')
    else:
        print('NA')

Solution (Python):
def check_mm(string):
    if int(string) <= 12 and int(string) > 0:
        return True
    return False


S = input()
former = S[:2]
latter = S[2:]
former_mm = check_mm(former)
latter_mm = check_mm(latter)
if former_mm and latter_mm:
    print('AMBIGUOUS')
elif former_mm:
    print('MMYY')
elif latter_mm:
    print('YYMM')
else:
    print('NA')

Solution (Python):
string = input()
sep = [int(string[i: i+2]) for i in range(0, len(string), 2)]
if (12 >= sep[0] and sep[0] >= 1) and (12 >= sep[1] and sep[1] >= 1):
    print("AMBIGUOUS")
elif (sep[0] >= 13 or sep[0] == 0) and (sep[1] <=12 and sep[1] >= 1):
    print("YYMM")
elif(sep[0] <= 12 and sep[0] >= 1) and (sep[1] >= 13 or sep[1] == 0):
    print("MMYY")
else:
    print("NA")

Solution (Python):
S = input()
if 0 < int(S[:2]) <= 12 and 0 < int(S[2:]) <= 12:
    print('AMBIGUOUS')
elif 0 < int(S[:2]) <= 12:
    print('MMYY')
elif 0 < int(S[2:]) <= 12:
    print('YYMM')
else:
    print('NA')

Solution (Python):
A=input()
B,C=int(A[0:2]),int(A[2:4])
if 1<=B<=12 and 1<=C<=12:
    print("AMBIGUOUS")
elif 1<=B<=12:
    print("MMYY")
elif 1<=C<=12:
    print("YYMM")
else:
    print("NA")

Solution (Python):
s=input()
a=int(s[:2])
b=int(s[2:])
if 0<a<13 and 0<b<13:
  print('AMBIGUOUS')
elif 0<a<13:
  print('MMYY')
elif 0<b<13:
  print('YYMM')
else:
  print('NA')

Solution (Python):
S = input()
month = ["01","02","03","04","05","06","07","08","09","10","11","12"]

if (S[:2] in month):
    if (S[2:] in month):
        print('AMBIGUOUS')
    else:
        print('MMYY')
else:
    if (S[2:] in month):
        print('YYMM')
    else:
        print('NA')

Solution (Python):



s = [int(i) for i in input()]
f = int(s[0]*10+s[1])
s = int(s[2]*10+s[3])

def is_month(num):
    if num > 0 and num < 13:
        return True
    return False

if is_month(f) and is_month(s):
    print('AMBIGUOUS')
elif not is_month(f) and not is_month(s):
    print('NA')
elif is_month(f):
    print('MMYY')
else:
    print('YYMM')

Solution (Python):

s1 = input()

s2 = s1[0:2]
s3 = s1[2:4]

f1 = True
f2 = True

if int(s2) <= 0 or int(s2) >= 13:
    f1 = False

if  int(s3) <= 0 or int(s3) >= 13:
    f2 = False

s4 = ""
if f1 == False and f2 == False:
    s4 = "NA"
elif f1 == True and f2 == False:
    s4 = "MMYY"
elif f1 == False and f2 == True:
    s4 = "YYMM"
else:
    s4 = "AMBIGUOUS"

print(s4)

Solution (Python):
s = input()
s1 = s[0:2]
s2 = s[2:5]
if 1 <= int(s1) <=12 and 1<= int(s2) <=12:
    print("AMBIGUOUS")
elif 1 <= int(s1) <=12:
    print("MMYY")
elif 1<= int(s2) <=12:
    print("YYMM")
else:
    print("NA")

Solution (Python):
S = input()
s = list(S)

a = int(s[0] + s[1])
b = int(s[2] + s[3])

YYMM = 0
MMYY = 0

if (a >= 1) & (a <= 12):
    MMYY += 1

if (b >= 1) & (b <= 12):
    YYMM += 1

if (YYMM == 1) & (MMYY == 1):
    print('AMBIGUOUS')
elif (YYMM == 0) & (MMYY == 0):
    print('NA')
if (YYMM == 1) & (MMYY == 0):
    print('YYMM')
if (YYMM == 0) & (MMYY == 1):
    print('MMYY')

Solution (Python):
S = input()
head = int(S[:2])
tail = int(S[2:])
head_key=False
tail_key=False
if 12>=head>=1:
  head_key=True
if 12>=tail>=1:
  tail_key=True

if head_key == True and tail_key==True :
  print('AMBIGUOUS')
elif head_key == True and tail_key==False:
  print('MMYY')
elif head_key == False and tail_key==True:
  print('YYMM')
else:
  print('NA')

Solution (Python):
from datetime import datetime

S = input()

try:
    datetime.strptime(S, '%m%y')
except:
    try:
        datetime.strptime(S, '%y%m')
    except:
        print("NA")
    else:
        print("YYMM")
else:
    try:
        datetime.strptime(S, '%y%m')
    except:
        print("MMYY")
    else:
        print("AMBIGUOUS")

Solution (Python):
a,b,c,d=input()
zenhan=int(a)*10+int(b)
kouhan=int(c)*10+int(d)
if zenhan>=13 or zenhan==0:
  if kouhan>=13 or kouhan==0:
    print('NA')
  else:
    print('YYMM')
else:
  if kouhan>=13 or kouhan==0:
    print('MMYY')
  else:
    print('AMBIGUOUS')

Solution (Python):
S=input()
L=["01","02","03","04","05","06","07","08","09","10","11","12"]

if S[:2] in L:
    if S[2:] in L:
        print("AMBIGUOUS")
    else:
        print("MMYY")
else:
    if S[2:] in L:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
s = input()
a = int(s[:2])
b = int(s[2:])
if 1<=a<=12 and 1<=b<=12:
  print("AMBIGUOUS")
elif 1<=a<=12:
  print("MMYY")
elif 1<=b<=12:
  print("YYMM")
else:
  print("NA")

Solution (Python):
S = input()

def isMM(num):
    if 1 <= num <= 12:
        return True
    return False

if isMM(int(S[0:2])) and isMM(int(S[2:])):
    print('AMBIGUOUS')
elif isMM(int(S[0:2])):
    print('MMYY')
elif isMM(int(S[2:])):
    print('YYMM')
else:
    print('NA')

Solution (Python):

import numpy as np
S = raw_input()
first  = int(S[:2])
second = int(S[2:])

if first==0:
    if (second==0)|(second>=13):
        print "NA"
    else:
        print "YYMM"
elif (first>0) & (first<13):
    if (second > 0) & (second<13):
        print "AMBIGUOUS"
    else:
        print "MMYY"
else:
    if (second == 0)|(second>=13):
        print "NA"
    if (second>0) & (second<13):
        print "YYMM"

Solution (Python):
s = input()
if int(s[0:2]) > 0 and int(s[0:2]) < 13:
    if int(s[2:4]) > 0 and int(s[2:4]) < 13:
        print("AMBIGUOUS")
    else:
        print("MMYY")
else:
    if int(s[2:4]) > 0 and int(s[2:4]) < 13:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
s = input()
m = int(s[0:2])
n = int(s[2:4])

if m == 00 or m >= 13:
    if n == 00 or n >= 13:
        print("NA")
    else:
        print("YYMM")
else:
    if n == 00 or n >= 13:
        print("MMYY")
    else:
        print("AMBIGUOUS")

Solution (Python):
S = list(input())
A = int("".join([S[0],S[1]]))
B = int("".join([S[2],S[3]]))


if 1 <= A <= 12:
    if 1 <= B <= 12:
        print("AMBIGUOUS")
    else:
        print("MMYY")
else:
    if 1 <= B <= 12:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
def judge(S):
    a=int(S[:2])
    b=int(S[2:])
    if 1<=a<=12 and 1<=b<=12:
        return "AMBIGUOUS"
    elif 1<=a<=12:
        return "MMYY"
    elif 1<=b<=12:
        return "YYMM"
    else:
        return "NA"

S=input()
print(judge(S))

Solution (Python):
S = input()
fh = int(S[:2])
of = int(S[2:])
if 1 <= fh <= 12:
    if 1<= of <= 12:
        print("AMBIGUOUS")
    else:
        print("MMYY")
else:
    if 1 <= of <= 12:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
S = input()

fh = ""
of = ""
fh_num = int(S[:2])
of_num = int(S[2:])

if 1 <= fh_num <= 12:
    fh = "M"

if 1 <= of_num <= 12:
    of = "M"

if fh == "" and of == "":
    print("NA")
    exit(0)

if fh == "" and of == "M":
    print("YYMM")
    exit(0)

if fh == "M" and of == "":
    print("MMYY")
    exit(0)

print("AMBIGUOUS")

Solution (Python):
s=input()
num1=s[:2]
num2=s[2:]
if(int(num1)<=12)and(int(num1)>=1):
  if(int(num2)<=12)and(int(num2)>=1):
    print('AMBIGUOUS')
  else:
    print('MMYY')
elif(int(num2)<=12)and(int(num2)>=1):
  print('YYMM')
else:
  print('NA')

Solution (Python):


s = list(input())
a = s[0] + s[1]
a = int(a)
b = s[2] + s[3]
b = int(b)

yymm = False
mmyy = False

if 1 <= b <= 12:
    yymm = True

if 1 <= a <= 12:
    mmyy = True

if yymm and mmyy:
    print("AMBIGUOUS")
elif yymm:
    print("YYMM")
elif mmyy:
    print("MMYY")
else:
    print("NA")

Solution (Python):
S = input()
num1 = S[:2]
num2 = S[2:]
if 0 < int(num1) <= 12 and 0 < int(num2) <= 12:
    print("AMBIGUOUS")
elif 0 <= int(num1) <= 99 and 0 < int(num2) <= 12:
    print("YYMM")
elif 0 < int(num1) <= 12 and 0 <= int(num2) <= 99:
    print("MMYY")
else:
    print("NA")

Solution (Python):
S = input()

def exammonth(c):
    if 0 < c and c < 13:
        return 1
    else:
        return 0











if exammonth(int(S[2:4])) == 1:
    if exammonth(int(S[0:2])) == 1:
        print('AMBIGUOUS')
    else:
        print('YYMM')
else:
    if exammonth(int(S[0:2])) == 1:
        print('MMYY')
    else:
        print('NA')

Solution (Python):
input_str = input()

num1 = int(input_str[0:2])
num2 = int(input_str[2:4])

def isMonthFormat(num):
    return num >= 1 and num <= 12

flag1 = isMonthFormat(num1)
flag2 = isMonthFormat(num2)

if flag1 and flag2:
    print("AMBIGUOUS")
elif not flag1 and not flag2:
    print("NA")
elif flag1:
    print("MMYY")
else:
    print("YYMM")

Solution (Python):
s=input()
n1=int(s[:2])
n2=int(s[2:])

if (n1==0 or n1>=13) and (n2>=1 and n2<=12):
    print("YYMM")
elif (n1>=1 and n1<=12) and (n2==0 or n2>=13):
    print("MMYY")
elif (n1>=1 and n1<=12) and (n2>=1 and n2<=12):
    print("AMBIGUOUS")
else:
    print("NA")

Solution (Python):
s = input()

first = int(s[:2])
second = int(s[2:])

firstFlag = 0
secondFlag = 0

if first > 12 or first < 1:
	firstFlag = 1

if second > 12 or second < 1:
	secondFlag = 1

if firstFlag == 0:
	if secondFlag == 0:
		print("AMBIGUOUS")
	else:
		print("MMYY")
elif firstFlag == 1:
	if secondFlag == 0:
		print("YYMM")
	else:
		print("NA")

Solution (Python):
S = int(input())
L = S // 100
R = S % 100
if 1 <= L <= 12 and 1 <= R <= 12:
  print("AMBIGUOUS")
elif 1 <= L <= 12 and (R >= 13 or R == 0):
  print("MMYY")
elif (L >= 13 or L == 0) and 1 <= R <= 12:
  print("YYMM")
else:
  print("NA")

Solution (Python):
s = int(input())
a = s//100
b = s%100
if b <= 12 and b >= 1:
    if a <= 12 and a >= 1:
        print("AMBIGUOUS")
    else:
        print("YYMM")
else:
    if a <= 12 and a >= 1:
        print("MMYY")
    else:
        print("NA")

Solution (Python):
import re
import sys
input = sys.stdin.readline

s = input()
a = '[0][1-9]' if '0' in s[0] else '[1][0-2]'
b = '[0][1-9]' if '0' in s[2] else '[1][0-2]'
if re.search(b,s[2:4]):
    if re.search(a,s[0:2]):
        ans = 'AMBIGUOUS'
    else:
        ans = 'YYMM'
elif re.search(a,s[0:2]):
    ans = 'MMYY'
else:
    ans = 'NA'
print(ans)

Solution (Python):
from sys import stdin

l = stdin.readline().rstrip()
month_possible = ['01','02','03','04','05','06','07','08','09','10','11','12']
year_possible = ['00']

fo = ''.join(l[0:2])
la = ''.join(l[2:])

if 0 < int(fo) <= 12:
    if 0 < int(la) <= 12:
        print("AMBIGUOUS")
    elif 0 <= int(la) < 100:
        print("MMYY")
    else:
        print("NA")
else:
    if 0 < int(la) <= 12:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
s = input()
h = int(s[0:2])
t = int(s[2:4])

h_mm = 0
t_mm = 0
if 1 <= h <= 12:
  h_mm = 1
if 1 <= t <= 12:
  t_mm = 1
  
print(["NA", "YYMM", "MMYY", "AMBIGUOUS"][h_mm * 2 + t_mm])

Solution (Python):
S=input()
ans='NA'
M_list=['01','02','03','04','05','06','07','08','09','10','11','12']
if S[0:2] in M_list:
	ans='MMYY'
if S[2:4] in M_list:
	if ans=='MMYY':
		ans='AMBIGUOUS'
	else:
		ans='YYMM'
print(ans)

Solution (Python):
s = input()

first = s[:2]
second = s[2::]

if 1 <= int(first) <= 12:
    if 1 <= int(second) <= 12:
        print("AMBIGUOUS")
    else:
        print("MMYY")
else:
    if 1 <= int(second) <= 12:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
s = input()

left = int(s[:2])
right = int(s[2:])

ans = "NA"

if 0 < left <13:
    if 0 < right < 13:
        ans = "AMBIGUOUS"
    else:
        ans = "MMYY"
else :
    if 0 < right < 13:
        ans = "YYMM"



print(ans)

Solution (Python):
S = input()

S_one = int(S[:2])
S_two = int(S[2:])

if S_one == 0:
    if 1 <= S_two <= 12:
        print('YYMM')
    else:
        print('NA')
elif 1 <= S_one <= 12:
    if 1 <= S_two <= 12:
        print('AMBIGUOUS')
    else:
        print('MMYY')
else:
    if 1 <= S_two <= 12:
        print('YYMM')
    else:
        print('NA')

Solution (Python):
S = [int(i) for i in list(input())]
if S[2]*10+S[3]<13 and S[2]+S[3]!=0:
    if S[0]*10+S[1]<13 and S[0]+S[1]!=0:
        print("AMBIGUOUS")
    else:
        print("YYMM")
else:
    if S[0]*10+S[1]<13 and S[0]+S[1]!=0:
        print("MMYY")
    else:
        print("NA")

Solution (Python):
S=input()
a=int(S[:2])
b=int(S[2:])
if 1<=a<=12:
    if 1<=b<=12:
        ans='AMBIGUOUS'
    else:
        ans='MMYY'
else:
    if 1<=b<=12:
        ans='YYMM'
    else:
        ans='NA'
print(ans)

Solution (Python):
S = input()

AA = int(S[0:2])
BB = int(S[2:4])

if AA > 0 and AA <= 12:
    A = True
else:
    A = False

if BB > 0 and BB <= 12:
    B = True
else:
    B = False

if A and B:
    print("AMBIGUOUS")
elif B:
    print("YYMM")
elif A:
    print("MMYY")
else:
    print("NA")

Solution (Python):
S = [i for i in input()]
mae = S[0]+S[1]
ushiro = S[2]+S[3]
mmyy = True if int(mae)>0 and int(mae)<=12 else False
yymm = True if int(ushiro)>0 and int(ushiro)<=12 else False

if mmyy==True and yymm==True:
    print("AMBIGUOUS")
elif mmyy==True and yymm==False:
    print("MMYY")
elif mmyy==False and yymm==True:
    print("YYMM")
else:
    print("NA")

Solution (Python):
S = input()
A = int(S[:2])
B = int(S[2:])

if 1<=A<=12 and 1<=B<=12:
  print("AMBIGUOUS")
elif 1<=A<=12:
  print("MMYY")
elif 1<=B<=12:
  print("YYMM")
else:
  print("NA")

Solution (Python):
if __name__ == '__main__':
    s = input()
    f = s[:2]
    t = s[2:]
    yymm = (int(t) <= 12 and int(t) != 0)
    mmyy = (int(f) <= 12 and int(f) != 0)
    if yymm and mmyy:
        print("AMBIGUOUS")
    elif yymm:
        print("YYMM")
    elif mmyy:
        print("MMYY")
    else:
        print("NA")

Solution (Python):
n = int(input()[:4])
a = n//100
b = n%100
if 0<a<=12 and 0<b<=12:
    print('AMBIGUOUS')
elif 1<=a<=12 and (b>=13 or b==0):
    print('MMYY')
elif 1<=b<=12 and (13<=a or a==0):
    print('YYMM')
else:
    print('NA')

Solution (Python):



s = input()
a, b = map(int,(s[:2],s[2:]))

flag = "00"
dict = {
  "00": "NA",
  "10": "MMYY",
  "01": "YYMM",
  "11": "AMBIGUOUS",
}

if 0 < a < 13:
  flag = "1" + flag[1]

if 0 < b < 13:
  flag = flag[0] + "1"
  
print(dict[flag])

Solution (Python):
S = input()
left = int(S[:2])
right = int(S[2:])

ans = "NA"
if left == 0:
  if 0 < right < 13:
    ans = "YYMM"
elif right == 0:
  if 0 < left < 13:
    ans = "MMYY"
elif 0 < left < 13:
  if 0 < right < 13:
    ans = "AMBIGUOUS"
  else:
    ans = "MMYY"
elif 0 < right < 13:
  if left > 12:
    ans = "YYMM"
print(ans)

Solution (Python):
s = list(input())
count = 0

if s[2] == "1":
    if 0 <= int(s[3]) <= 2:
        count += 1
elif s [2] == "0":
    if  1 <= int(s[3]) <= 9:
        count += 1

if s[0] == "1":
    if 0 <= int(s[1]) <= 2:
        count += 2
elif s [0] == "0":
    if  1 <= int(s[1]) <= 9:
        count += 2

if count == 1:
    print("YYMM")
elif count == 2:
    print("MMYY")
elif count == 3:
    print("AMBIGUOUS")
else:
    print("NA")

Solution (Python):



s = input()
a, b = map(int,(s[:2],s[2:]))

flag = "00"
dict = {
  "00": "NA",
  "10": "MMYY",
  "01": "YYMM",
  "11": "AMBIGUOUS",
}

if 0 < a < 13:
  flag = "1" + flag[1]

if 0 < b < 13:
  flag = flag[0] + "1"
  
print(dict[flag])

Solution (Python):



s = int(input())






a = s // 100
b = s % 100

if (1 <= a and a <= 12) :
    if (1 <= b and b <= 12) :
        print("AMBIGUOUS")
    else :
        print("MMYY")
else :
    if (1 <= b and b <= 12) :
        print("YYMM")
    else :
        print("NA")

Solution (Python):
S = raw_input()

first = int(S[0:2])
second = int(S[2:])

if first > 0 and first < 13:
    vmf = True
else:
    vmf = False
    
if second > 0 and second < 13:
    vms = True
else:
    vms = False

if vmf and vms:
    print "AMBIGUOUS"
elif vmf and not vms:
    print "MMYY"
elif not vmf and vms:
    print "YYMM"
else:
    print "NA"

Solution (Python):
s = input()
if '01' <= s[:2] <= '12':
    if '01' <= s[2:] <= '12':
        print('AMBIGUOUS')
    else:
        print('MMYY')
else:
    if s[2:] > '12' or s[2:] == '00':
        print('NA')
    else:
        print('YYMM')

Solution (Python):
s = int(input())
a = s//100
b = s%100

if 1 <= a <= 12:
  if 1 <= b <= 12:
    print("AMBIGUOUS")
  else:
    print("MMYY")
else:
  if 1 <= b <= 12:
    print("YYMM")
  else:
    print("NA")

Solution (Python):
S = input()
s_1 = S[:2]
s_2 = S[2:]

def mm_checker(s):
  if int(s) <= 12 and int(s) > 0:
    return True
  return False

if mm_checker(s_1) and mm_checker(s_2):
  print('AMBIGUOUS')

elif mm_checker(s_1) and not mm_checker(s_2):
  print('MMYY')
elif not mm_checker(s_1) and mm_checker(s_2):
  print('YYMM')
else:
  print('NA')

Solution (Python):
s=input()
a=int(s[:2])
b=int(s[2:])
print("AMBIGUOUS" if 1<=a<=12 and 1<=b<=12 else "YYMM" if 1<=b<=12 else "MMYY" if 1<=a<=12 else "NA")

Solution (Python):
S = input()

Y = int(S[:2])
M = int(S[2:])

if(Y <= 12 and M <= 12 and Y > 0 and M > 0):
    print('AMBIGUOUS')
elif(Y <= 12 and Y > 0):
    print('MMYY')
elif(M <= 12 and M > 0):
    print('YYMM')
else:
    print('NA')

Solution (Python):
S = list(input())
h  = S[0]+S[1]
l  = S[2]+S[3]
h,l = int(h),int(l)
if l<=12 and l>0:
    if h<=12 and h>0:
        print('AMBIGUOUS')
    else:
        print('YYMM')
elif h<=12 and h>0:
    print('MMYY')
else:
    print('NA')

Solution (Python):
s = input()

def chr_to_index(chr):
  a = []
  n = len(chr)
  for i in range(n):
    a.append(chr[i])
  return a

my = chr_to_index(s)

mae = int(my[0])*10 + int(my[1])
ato = int(my[2])*10 + int(my[3])

if mae in range(1,13) and ato in range(1,13):
    print("AMBIGUOUS")
elif mae in range(1,13):
    print("MMYY")
elif ato in range(1,13):
    print("YYMM")
else:
    print("NA")

Solution (Python):
s=input()
s1 = int(s[0]+s[1])
s2 = int(s[2]+s[3])

if 1<=s1 and s1<=12:
    if 0<=s2 and s2<=99:
        if 1<=s2 and s2<=12:
            print("AMBIGUOUS")
        else:
            print("MMYY")
    else:
        print("NA")
else:
    if 0<=s1 and s1<=99:
        if 1 <= s2 and s2 <= 12:
            print("YYMM")
        else:
            print("NA")
    else:
        if 1 <= s2 and s2 <= 12:
            print("YYMM")
        else:
            print("NA")

Solution (Python):
import sys

def check_YYMMorMMYY(str_date):
    str1=str_date[:2]
    str2=str_date[2:]
    num1=int(str1)
    num2=int(str2)
    
    
    
    
    
    
    
    
    
    
    if 1<=num1<=12:
        if 1<=num2<=12:
            print("AMBIGUOUS")
        else :
            print("MMYY")
    else:
        if 1<=num2<=12:
            print("YYMM")
        else:
            print("NA")

str_S=input()


if str_S.isdecimal()==0 or len(str_S)!=4 :
    print("Unexpected S")
    sys.exit()

check_YYMMorMMYY(str_S)

Solution (Python):
s = input()
x = int(s[0:2])
y = int(s[2:4])

flagx = flagy = 0
if 1 <= x <= 12:
  flagx = 1
if 1 <= y <= 12:
  flagy = 1
if flagx == 1 and flagy ==  1:
  print("AMBIGUOUS")
elif flagx == 1 and flagy == 0:
  print("MMYY")
elif flagx == 0 and flagy == 1:
  print("YYMM")
else:
  print("NA")

Solution (Python):
a = input()
over = int(a[:2])
under = int(a[2:])
if 0<over<13 and 0<under<13:
   print("AMBIGUOUS")
elif 0<over<13 and (1>under or under>12):
     print("MMYY")
elif 0<under<13 and (1>over or over>12):
     print("YYMM")
else:
     print("NA")

Solution (Python):
s=input()
sh=int(s[0:2])
sl=int(s[2:4])

jh,jl=False,False
if sh>=1 and sh<=12:
    jh=True
if sl>=1 and sl<=12:
    jl=True

if jh and jl:
    print("AMBIGUOUS")
elif jh:
    print("MMYY")
elif jl:
    print("YYMM")
else :
    print("NA")

Solution (Python):
from __future__ import print_function


import sys
input = sys.stdin.readline

def eprint(*args, **kwargs):
    print(*args, file=sys.stderr, **kwargs)

import math
import string
import fractions
from fractions import Fraction
from fractions import gcd
def lcm(n,m):
    return int(n*m/gcd(n,m))

import re
import array
import copy
import functools
import operator

import collections
import itertools
import bisect
import heapq


from heapq import heappush
from heapq import heappop
from heapq import heappushpop
from heapq import heapify
from heapq import heapreplace

from queue import PriorityQueue as pq



import random


def main():
    l = input()
    l1=int(l[0:2])
    l2=int(l[2:4])
    eprint(l1)
    eprint(l2)
    if 1<=l1<=12 and 1<=l2<=12:
        print("AMBIGUOUS")
    elif 1<=l1<=12:
        print("MMYY")
    elif 1<=l2<=12:
        print("YYMM")
    else:
        print("NA")

if __name__ == '__main__':
    main()

Solution (Python):
S = input()

aa = S[0:2]
bb = S[2:4]


def isYY(yy):
    if 0 <= int(yy) and int(yy) <= 99:
        return True
    else:
        return False


def isMM(mm):
    if 1 <= int(mm) and int(mm) <= 12:
        return True
    else:
        return False


ans = []
if isYY(aa) and isMM(bb):
    
    ans.append('YYMM')
if isMM(aa) and isYY(bb):
    
    ans.append('MMYY')

if len(ans) >= 2:
    print('AMBIGUOUS')
elif len(ans) == 1:
    print(ans[0])
else:
    print('NA')

Solution (Python):
s = input()

s1 = int(s[0:2])
s2 = int(s[2:4])

if (s1 == 0 or s1 > 12) and (s2 == 0 or s2 > 12):
    print("NA")
elif (0 < s1 < 13) and (0 < s2 < 13):
    print("AMBIGUOUS")
else:
    if (0 < s1 < 13):
        print("MMYY")
    else:
        print("YYMM")

Solution (Python):
def chk(n):
    if 0<n<=12: return 1
    else: 0

s=input()
a,b=int(s[0:2]),int(s[2:4])

if chk(a) and chk(b): print("AMBIGUOUS")

elif chk(a) and not chk(b): print("MMYY")

if not chk(a) and chk(b) : print("YYMM")

if not chk(a) and not chk(b): print("NA")

Solution (Python):
s=input()
x=int(s[:2])
y=int(s[2:])
a=b=0
if(y<=12)and(y>=1):
    a=1
if(x<=12)and(x>=1):
    b=1

if(a==1)and(b==1):
    print('AMBIGUOUS')
elif(a==1):
    print('YYMM')
elif(b==1):
    print("MMYY")
else:
    print("NA")

Solution (Python):
S=int(input())
a=S//100
b=S%100

if 0<a<13 and 0<b<13:
  print('AMBIGUOUS')
elif 0<a<13:
  print('MMYY')
elif 0<b<13:
  print('YYMM')
else:
  print('NA')

Solution (Python):
s = int(input())
a = s//100
b = s%100
if 0<a<13 and 0<b<13:
  print('AMBIGUOUS')
elif 0<a<13:
  print('MMYY')
elif 0<b<13:
  print('YYMM')
else:
  print('NA')

Solution (Python):
S = input()

A = int(S[:2])
B = int(S[2:])

def isMonth(i) :
    if i >= 1 and i <= 12 :
        return True
    else :
        return False

if isMonth(A) and isMonth(B) :
    print('AMBIGUOUS')
elif not isMonth(A) and isMonth(B) :
    print('YYMM')
elif isMonth(A) and not isMonth(B) :
    print('MMYY')
else :
    print('NA')

Solution (Python):
s = int(input())
left = s // 100
right = s % 100
left_is_MM = (1 <= left <= 12)
right_is_MM = (1 <= right <= 12)
if(left_is_MM) and (right_is_MM):
    print('AMBIGUOUS')
elif(left_is_MM):
    print('MMYY')
elif(right_is_MM):
    print('YYMM')
else:
    print('NA')

Solution (Python):
s = input()
a = int(s[:2])
b = int(s[2:])
if a <= 12 and a > 0:
	if b <=12 and b > 0:
		print('AMBIGUOUS')
	else:
		print('MMYY')
else:
	if b <=12 and b > 0:
		print('YYMM')
	else:
		print('NA')

Solution (Python):
S = input()
if 1 <= int(S[:2]) <= 12 and 1 <= int(S[2:]) <= 12:
  print("AMBIGUOUS")
elif 1 <= int(S[:2]) <= 12:
  print("MMYY")
elif 1 <= int(S[2:]) <= 12:
  print("YYMM")
else:
  print("NA")

Solution (Python):
s = input()
l = 1 <= int(s[:2]) <= 12
r = 1 <= int(s[2:]) <= 12
if l and r:
    print("AMBIGUOUS")
elif l:
    print('MMYY')
elif r:
    print('YYMM')
else:
    print('NA')

Solution (Python):
ss = input()
s = int(ss)

ue = s // 100
sita = s % 100
if ue > 12:
    if sita <= 12 and sita != 0:
        print("YYMM")
    else:
        print("NA")
elif ue == 0:
    if sita <= 12 and sita != 0:
        print("YYMM")
    else:
        print("NA")
else:
    if sita <= 12 and sita != 0:
        print("AMBIGUOUS")
    else:
        print("MMYY")

Solution (Python):

S =input()
if 1 <= int(S[:2]) <=12 and 1 <= int(S[2:]) <=12:
    print("AMBIGUOUS")
elif  1 <= int(S[:2]) <=12:
    print('MMYY')
elif  1 <= int(S[2:]) <=12:
    print('YYMM')
else:
    print('NA')

Solution (Python):
s = input()
l = 1 <= int(s[:2]) <= 12
r = 1 <= int(s[2:]) <= 12
if l:
    if r:
        print("AMBIGUOUS")
    else:
        print("MMYY")
else:
    if r:
        print("YYMM")
    else:
        print("NA")

Solution (Python):
S = input().strip()

s0 = int(S[:2])
s1 = int(S[2:])

if 1 <= s0 <= 12 and 1 <= s1 <= 12:
    print("AMBIGUOUS")
elif 1 <= s0 <= 12 and not 1 <= s1 <= 12:
    print("MMYY")
elif not (1 <= s0 <= 12) and 1 <= s1 <= 12:
    print("YYMM")
elif not (1 <= s0 <= 12) and not 1 <= s1 <= 12:
    print("NA")

Solution (Python):


s = input()
a = int(s[:2])
b = int(s[2:5])

if 1 <= a <= 12 and 1 <= b <= 12:
    print('AMBIGUOUS')
elif (a == 0 or a >= 13) and (1 <= b <= 12):
    print('YYMM')
elif (b == 0 or b >= 13) and (1 <= a <= 12):
    print('MMYY')
else:
    print('NA')

Solution (Python):
S = input()
year = int(S[:2])
month = int(S[2:])
if (month <= 12 and month >=1) and (year >= 1 and year <= 12):
    print('AMBIGUOUS')
elif (month <= 12 and month >= 1) and ((year >= 13 and year <= 99) or (year==0)):
    print('YYMM')
elif (year <= 12 and year >= 1) and ((month >= 13 and month <= 99) or (month==0)):
    print('MMYY')
else:
    print('NA')

Solution (Python):
S=input()
b=int(S[:2])
a=int(S[2:])
c=(b<1)+(b>12)
d=((a<1)+(a>12))*2
e=c+d
print(["AMBIGUOUS","YYMM","MMYY","NA"][e])

Solution (Python):
s=input()
a=int(s[:2])
b=int(s[2:])

if a==0:
  if b>0 and b<13:
    print("YYMM")
  else:
    print("NA")
elif a>0 and a<13:
  if b ==0 :
    print("MMYY")
  elif b>0 and b<13:
    print("AMBIGUOUS")
  else:
    print("MMYY")
else:
  if b==0:
    print("NA")
  elif b>0 and b<13:
    print("YYMM")
  else:
    print("NA")

Solution (Python):
s = input()

front = int(s[0:2])
back = int(s[2:4])


def check_type(val):
    if 1 <= val <= 12:
        return 'm'
    else:
        return 'y'


r_front = check_type(front)
r_back = check_type(back)

if r_front == 'y' and r_back == 'm':
    print('YYMM')
elif r_front == 'm' and r_back == 'y':
    print('MMYY')
elif r_front == 'm' and r_back == 'm':
    print('AMBIGUOUS ')
else:
    print('NA')

Solution (Python):
s = input()

if((int)(s[0:2]) <= 12 and (int)(s[0:2]) >= 1) :
    if(int(s[2:]) <=12 and (int)(s[2:]) >=1):
        print("AMBIGUOUS")
    elif(int(s[2:]) <= 99 and (int)(s[2:]) >= 0):
        print("MMYY")
    else:
        print("NA")
elif ((int)(s[0:2]) <= 99 and (int)(s[0:2]) >= 0):
     if((int)(s[2:]) <=12 and (int)(s[2:]) >=1):
         print("YYMM")
     else:
         print("NA")
else:
    print("NA")

Solution (Python):
S = input()

before, after = int(S[:2]), int(S[2:])

if 0 < before and before <= 12 and 0 < after and after <= 12:
	print('AMBIGUOUS')
elif (before > 12 or before == 0) and 0 < after and after <= 12:
	print('YYMM')
elif 0 < before and before <= 12 and (12 < after or after == 0):
	print('MMYY')
else:
	print('NA')

Solution (Python):
s = input()

a = int(s[:2])
b = int(s[2:])

if 1 <= a <= 12 and 1 <= b <= 12:
  ans = "AMBIGUOUS"
elif 1 <= a <= 12:
  ans = "MMYY"
elif 1 <= b <= 12:
  ans = "YYMM"
else:
  ans = "NA"
  
print(ans)

Solution (Python):
S=input()
if 1<=int(S[0:2])<=12:
    if 1<=int(S[2:4])<=12:print("AMBIGUOUS")
    else:print("MMYY")
else:
    if 1<=int(S[2:4])<=12:print("YYMM")
    else:print("NA")