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