You have a busy schedule to keep up with. Every time you
make a new appointment, you scribble the starting time down on
a little note pad. At the start of every day (12:00 a.m.), you
sort the appointments for that day from earliest to latest and
then go to sleep. Instead of having to be up at midnight every
night to sort your appointments, you decide this would be a
good job for your computer.
Input
Input contains at most $100$ test cases. Each test case
describes the appointments for a single day, starting with a
line containing the number of appointments $1 \leq n \leq 100$. Following this
are $n$ lines, each
containing one appointment time. Each appointment time has the
format H:M Z where H is
an integer in the range $[1,
12]$ representing the hour, M is a
zeropadded twodigit integer in the range $[00, 59]$ representing the minute,
and and Z is either ‘a.m.’ or ‘p.m.’ representing
times before or after midday, respectively. The sequence of
test cases ends with a value of zero for $n$.
Output
For each test case, output the sequence of event starting
times sorted from earliest to latest in the day, one per line.
Format times in the same way as the input. Separate adjacent
test case outputs with a blank line.
Sample Input 1 
Sample Output 1 
5
3:00 a.m.
3:00 p.m.
12:00 a.m.
11:59 a.m.
12:00 p.m.
3
3:30 p.m.
9:30 a.m.
3:30 p.m.
0

12:00 a.m.
3:00 a.m.
11:59 a.m.
12:00 p.m.
3:00 p.m.
9:30 a.m.
3:30 p.m.
3:30 p.m.
