read `TreeLine.txt`: K:=10: for n from 1 to K do S:=ULtrees(n): S1:={seq(GClist([n,s],3), s in S)}: print(`There are`, nops(S), `unlabled trees on`, n, `vertices `): print(`The set of Line-Graph cardinalities of depth 3 has`, nops(S1), `here there are`): print(S1): print(``): if nops(S1)