11. Vector Concatenation

How do you plan to solve it?

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