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