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