68. 4-bit Comparator

How do you plan to solve it?

/*Write your code here*/
module maxmin4 (
    input [3:0] a,
    input [3:0] b,
    input [3:0] c,
    input [3:0] d,
    output reg [3:0] max,
    output reg [3:0] min
);
reg [3:0] maxab;
reg [3:0] maxcd;
reg [3:0] minab;
reg [3:0] mincd;
always @* begin
    maxab = (a >= b) ? a : b;
    maxcd = (c >= d) ? c : d;
    minab = (a < b) ? a : b;
    mincd = (c < d) ? c : d;
    max = (maxab >= maxcd) ? maxab : maxcd;
    min = (minab < mincd) ? minab : mincd;
end
endmodule