Event Log Summarization

You are given a series of log entries from a system. Each log entry is a line containing a timestamp and an event type separated by a space. The timestamp is in the format \(\texttt{YYYY-MM-DD HH:MM:SS}\) and the event type is one of error, warning, or info.

Your task is to produce a summary for each event type that appears in the logs. For each event type present, output three lines:

• The first line shows the event type (in uppercase with an added 'S', e.g. ERRORS, WARNINGS, INFOS) and the total count.
• The second line shows the earliest timestamp for that event.
• The third line shows the latest timestamp for that event.

The summary should list the events in the order: error, warning, info. If no log entries are provided (or only blank lines), output nothing.

All comparisons of timestamps can be performed lexicographically since the timestamp format \(\texttt{YYYY-MM-DD HH:MM:SS}\) is inherently ordered.

inputFormat

The input is provided via standard input (stdin) and consists of several lines. Each non-empty line represents a log entry in the format:

YYYY-MM-DD HH:MM:SS event_type

An empty line (or end of file) indicates the end of the input.

outputFormat

For each event type present in the input, output three lines (without any extra spaces):

• The first line: EVENTS count: X (where EVENTS is the uppercase form of the event type with an appended 'S', and X is the number of occurrences)
• The second line: EARLIEST: timestamp, showing the smallest timestamp.
• The third line: LATEST: timestamp, showing the largest timestamp.

The events should be reported in the following fixed order: error, warning, info. If an event type does not appear in the input, it should not be printed.

## sample

2023-05-01 08:22:33 error
2023-05-01 09:15:12 info
2023-05-01 10:45:01 error
2023-05-01 12:30:45 warning
2023-05-01 15:00:00 info
2023-05-01 16:20:00 warning

ERRORS count: 2
EARLIEST: 2023-05-01 08:22:33
LATEST: 2023-05-01 10:45:01
WARNINGS count: 2
EARLIEST: 2023-05-01 12:30:45
LATEST: 2023-05-01 16:20:00
INFOS count: 2
EARLIEST: 2023-05-01 09:15:12
LATEST: 2023-05-01 15:00:00

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