
module test(out);
output out;

`define wow
`define nest_one
`define second_nest
`define nest_two

`ifdef wow
    initial $display("wow is defined");
    `ifdef nest_one
        initial $display("nest_one is defined");
        `ifdef nest_two
            initial $display("nest_two is defined");
        `else
            initial $display("nest_two is not defined");
        `endif
    `else
        initial $display("nest_one is not defined");
    `endif
`else
    initial $display("wow is not defined");
    `ifdef second_nest
        initial $display("nest_two is defined");
     `else
        initial $display("nest_two is not defined");
     `endif
`endif

endmodule