68. 4-bit Comparator

How do you plan to solve it?

/*Write your code here*/
module maxmin4 (
    input [3:0] a, b, c, d,
    output [3:0] max, min
);
    wire [3:0] minab, maxab, mincd, maxcd;

    assign minab = (a < b) ? a : b;
    assign maxab = (a > b) ? a : b;

    assign mincd = (c < d) ? c : d;
    assign maxcd = (c > d) ? c : d;

    assign min = (minab < mincd ) ? minab : mincd;
    assign max = (maxab > maxcd ) ? maxab : maxcd;
endmodule