TURBILLION

bi bo in it li lo no nu oi on or ti to un ut

bin bio bit bot bro bun bur but ill ion lib lin lit lob lot nib nil nit nob nor not nub nut obi oil orb ort our out rib rin rob rot rub run rut til tin ton tor tub tui tun urb urn

bill bint birl biro blin blot blur boil boll bolt born bort bout brin brio brit brut bull bunt burl burn inro inti into iron lilo lilt lino lint lion liri litu loin lorn loti lour lout lunt nill noil noir nori null nurl obit rill riot roil roll roti rotl rout ruin runt till tirl tiro toil toll tolu tori torn tour trio turn unit unto