66. Demultiplexer

How do you plan to solve it?

/*Write your code here*/
module demux1to4 (input wire d,
                  input wire [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;
            default: y = 4'b0000;
        endcase
    end
endmodule