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