11. Vector Concatenation

How do you plan to solve it?

module concat8_packer (
    input  wire [3:0] A,
    input  wire [1:0] B,
    input  wire       C,
    input  wire       D,
    output wire [7:0] OUT
);
    assign OUT = {A[3:0], B[1:0], ~C, D};

endmodule