module swfsj3(input [1:0]SW,
					output [1:0]LEDR);
	wire Q;
	latch_D master(SW[1], SW[0], Q);
	latch_D slave(~SW[1], Q, LEDR[1]);

endmodule

module latch_D(Clk, D, Q);

	input Clk, D;
	output Q;

	wire R_g, S_g, Qa, Qb /* synthesis keep */;

	nand(S_g, D, Clk);
	nand(R_g, ~D, Clk);

	nand(Qa, S_g, Qb);
	nand(Qb, R_g, Qa);

	assign Q = Qa;

endmodule