68. 4-bit Comparator

How do you plan to solve it?

module maxmin4(
    input [3:0] a,
    input [3:0] b,
    input [3:0] c,
    input [3:0] d,
    output [3:0] max,
    output [3:0] min
);

    wire [3:0] max01, max02;
    wire [3:0] min01, min02;

    assign max01 = (a > b) ? a : b;
    assign max02 = (c > d) ? c : d;
    assign max = (max01 > max02) ? max01 : max02;

    assign min01 = (a < b) ? a : b;
    assign min02 = (c < d) ? c : d;
    assign min = (min01 < min02) ? min01 : min02;    

endmodule