11. Vector Concatenation

How do you plan to solve it?

packed array  input [3:0] A and 

unpacked array input [3:0] B

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