Asaphus Vision interview question

Here are the summarized coding challenge questions (which, in my perspective, lack meaningfulness): Create a Python script that reads a text file and identifies the four largest lexicographically non-overlapping substrings that meet certain conditions. These conditions include that the substrings must be contained within a single line, consist of strictly alphanumeric characters, and have a length of five characters. For each of these substrings, compute a pair representing its position: the line number in the file and the starting index within that line. Treat these four pairs as points in a Cartesian plane and calculate the area and perimeter of the quadrilateral formed by them. Replace these four locations in an output text file with underscores and design appropriate test cases.