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 reg [3:0]max,min
);
reg  [3:0]maxab,minab,maxcd,mincd;
always@(*)
begin
 maxab=(a>b)?a:b;
 minab=(a<b)?a:b;
 maxcd=(c>d)?c:d;
 mincd=(c<d)?c:d;

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

endmodule