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],   // [7:4]
        B[1:0],   // [3:2]
        ~C,       // [1]
        D         // [0]
    };
endmodule