mdp

module M

	x : [0..3];

	[] (x=0) -> (x'=1);
	[] (x=1) -> (x'=0);
	[] (x=1) -> 0.6:(x'=2) + 0.4:(x'=3);
	[] (x=2) -> (x'=2);
	[] (x=3) -> (x'=3);

endmodule

label "a" = x=2;
label "b" = x=3;