What is wrong with this code? Code coach is giving three hidden test fails

Question

a=input()
b=int(a[0:2])
c=str(b+12)
d=str(a[2:5])

def time():
if a[6]=='A':
print(a[0:5])
elif a[6]== 'P':
print(c+d)

if a[0:2]=='12'and a[-2]=='A':
print('00'+d)
else:

time()