Email Log Processing, Grouping, and Sorting

Complete the function below. The function receives the full standard input as a single string and must return the exact standard output lines for the described problem.

Original prompt

Problem: Email Log Processing (Grouping + Rule-based Sorting)

You are given a list of email event logs logs. Each log is a single line string in the format:

<timestamp> <sender_email> <receiver_email> <subject>

timestamp: a non-negative integer (seconds since epoch) sender_email, receiver_email: strings without spaces subject: the remainder of the line starting from the 4th token; it may contain spaces (and may be empty)

Your task is to group logs by sender_email, sort each group by specific rules, and print the result.

Rules

Group by sender_email. Within the same sender_email, sort logs by: timestamp ascending if equal, receiver_email lexicographically ascending if still equal, subject lexicographically ascending Output sender groups in lexicographical order of sender_email.

Input

Line 1: integer n, number of logs. Next n lines: one log per line.

Output

For each sender, print:

sender: <sender_email>

Then print each sorted log line as:

<timestamp> <receiver_email> <subject>

Note: sender_email is not printed on the log lines.

Constraints 1 <= n <= 2 * 10^5 0 <= timestamp <= 10^9 Each line length <= 300 Example

Input

5 100 alice@a.com bob@b.com hello 90 alice@a.com carl@c.com meeting notes 90 dan@d.com e@e.com hi 90 alice@a.com bob@b.com a-subject 100 dan@d.com a@a.com ping

Output

sender: alice@a.com 90 bob@b.com a-subject 90 carl@c.com meeting notes 100 bob@b.com hello sender: dan@d.com 90 e@e.com hi 100 a@a.com ping