A Cartesian Grid has a series of lines drawn on it$.$ Each line is defined by a list of $4$ values $x1,y1,x2,y2$ where

the points $(x1,y1)$ and $(x2,y2)$ are the end points of the line. The lines may or may not form a closed figure.

Write a Python program to read in the number of lines, followed by a series of lines in no particular order. Given

that some of these lines may not contribute to a closed figure, determine whether or not a subset of the given

lines would form a closed figure. If they form a closed figure, also print the number of sides.

For this program, you must use only the standard Python libraries. Third$-$party libraries are not allowed. The

following figure illustrates the problem.