Have the function

MatrixChallenge $($strArr$)$ read the strArr parameter being passed which will represent a $9$x$9$ Sudoku board of integers ranging from $1$ to $9.$ The rules of Sudoku are to place each of the $9$ integers integer in every row and column and not have any integers repeat in the respective row, column, or $3$x$3$ sub$-$grid. The input strazz will represent a Sudoku board and it will be structured in the following format: $["($N$,$N$,$N$,$N$,$N$,$x$,$x$,$x$,$x$)","(...)","(...)"....)]$ where N stands for an integer between $1$ and $9$ and x will stand for an empty cell. Your program will determine if the board is legal; the board also does not necessarily have to be finished. If the board is legal, your program should return the string legal but if it isn't legal, it should return the $3$x$3$ quadrants $($separated by commas$)$ where the errors exist. The $3$x$3$ quadrants are numbered from $1$ to $9$ starting from top$-$left going to bottom$-$ right.