11. Vector Concatenation

How do you plan to solve it?

module concat8_packer (
    input  [3:0] A,
    input  [1:0] B,
    input        C,
    input        D,
    output [7:0] OUT
);
    assign OUT[7:4] = A;
    assign OUT[3:2] = B;
    assign OUT[1]   = ~C;
    assign OUT[0]   = D;
endmodule