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