44. Bus Error Checker

How do you plan to solve it?

/*Write your code here*/
module error_checker_xz( bus, all_known, has_unknown, bus_if_known );
    input [7:0] bus;
    output all_known;
    output has_unknown;
    output [7:0] bus_if_known;

    
    wire check = ( ^( bus ^ bus ) ) === 1'bx;
    assign all_known = ~check;
    assign has_unknown = check;
    assign bus_if_known = {8{all_known}} & bus;
endmodule