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