Night Sky Watch Duration Bands

A citizen-astronomy network logs every stargazing session run on its shared telescopes. Each logged session has a duration measured in seconds, and every session must be filed into exactly one of four fixed duration bands based purely on how long it ran:

• 0-5: under 5 minutes (duration < 300 seconds)
• 5-10: at least 5 but under 10 minutes (300 <= duration < 600 seconds)
• 10-15: at least 10 but under 15 minutes (600 <= duration < 900 seconds)
• 15+: 15 minutes or more (duration >= 900 seconds)

Given the full list of logged sessions, report how many sessions fall into each band. Every band must be reported even when no session falls into it (its count is then 0).

Input format

The first line contains a single integer m, the number of logged sessions. Each of the next m lines contains two integers, session_id and duration_seconds, describing one session. session_id values are pairwise distinct and play no role in the answer beyond identifying the row.

Output format

Print exactly four lines, one per band, in this fixed order: 0-5, 5-10, 10-15, 15+. Each line contains the band's label, a single space, and the number of sessions in that band.

Constraints

• 0 <= m <= 100000
• 1 <= session_id <= 10^9, all session_id values distinct
• 1 <= duration_seconds <= 1000000

5
101 200
102 420
103 700
104 950
105 150

0-5 2
5-10 1
10-15 1
15+ 1

6
1 299
2 300
3 599
4 600
5 899
6 900

0-5 1
5-10 2
10-15 2
15+ 1