11. Vector Concatenation

How do you plan to solve it?

module concat8_packer(A, B, C, D, OUT);
    input  [3:0] A;
    input  [1:0] B;
    input C, D;
    output [7:0] OUT;

    assign OUT[7:4] = A;
    assign OUT[3:2] = B;
    assign OUT[1]   = ~C;   
    assign OUT[0]   = D;
endmodule