#nexus
begin host;
tree host =((Host a,Host b),(Host c, (Host d, Host e)));
endblock;
begin parasite;
tree parasite = (Parasite 1,((Parasite 2,Parasite 3),Parasite 4));
endblock;
begin distribution;
Range
	Parasite 1 : Host a,
	Parasite 2 : Host b,
	Parasite 3 : Host c,
	Parasite 4 : Host e;
endblock;