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 = {
    A[3:0],
    B[1:0],
    ~C,
    D
    };
endmodule