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