Maximum Possible Time Problem Statement

Given an array ARR consisting of exactly four integer digits, your task is to form the maximum possible valid time in a 24-hour format using those digits.

Explanation:

The 24-hour time format ranges from 00:00 to 23:59. If it's not possible to generate a valid time from the given digits, return -1.

Input:

T
ARR[0] ARR[1] ARR[2] ARR[3]
...(for each test case T)

Output:

Maximum time in HH:MM format for each test case or -1 if no valid time can be generated.

Example:

Input:
1
1 2 3 4
Output:
23:41

Constraints:

• 1 <= T <= 10
• 0 <= ARR[i] <= 9
• Time Limit: 1 second

Note:

You do not need to print anything; the code should return the valid string representation of the time.