66. Demultiplexer

How do you plan to solve it?

module demux1to4(
    input d,
    input [1:0]s,
    output reg [3:0]y
);

always @ (*)
begin 
    y=4'b0000;
    case(s)
    2'b00: y[0]=d;
    2'b01: y[1]=d;
    2'b10: y[2]=d;
    2'b11: y[3]=d;
    endcase
end 



endmodule