all you are left with are Hydrogens.		is there a terminal Oxygen in your structure?		Is there a Hydrogen bonded to that Oxygen already?		this is the first H that bonds to the terminal Oxygen, assign H to this bond. However, this bonding may have caused the structure to fail in a previous trial over bad FC (see arrangements). In case of a previous such fail, abandon the bonding with the oxygen in favor of bonding to the central atom. Also notice if the formula is specifically written to indicate a bond with O (see OH example)		recalculate T, remove 2 electrons from it
				We want to assign this H to bond with the central atom if possible. The question is, can the central atom make one more bond?				continue
			use the central atom's unused bond to connect one H via a SINGLE BOND		is there a terminal atom that can make one more bond with one hydrogen?		continue
			recalculate T, remove 2 electrons from it			use up one hydrogen with that terminal atom and connect via a SINGLE BOND
			continue			recalculate T, remove 2 electrons from it
						continue