Need help with the Military Time Challenge

Question

https://www.sololearn.com/coach/70?ref=app
I need help with the Military time challenge

Here's my code:

time=input()
time1=""
a=0
a=time.find(" ")
if time.endswith("AM"):
time1=time[:a]
elif time.endswith("PM"):
if time.startswith("12"):
time1=time[:a]
else:
a=time.find(':')
time1=time[0:a]
time1=int(time1)+12
time1=str(time1)+time[a:a+3]
print(time1)

Three of the test case are cleared but the two locked ones are not. Where am I wrong?

Answer 1

For input 12:00 AM output should be 00:00
And for all single digit hour value like 9:00 AM output should be 09:00
1:00 AM to 01:00

Answer 2

Thanks