PETROLLING

el en er et go in it li lo ne no oe oi on op or pe pi re ti to

ego ell eng eon erg ern gel gen get gie gin gip git gor got ill ion ire leg lei let lie lin lip lit log lop lot neg net nil nip nit nog nor not oil ole one ope opt ore ort peg pen per pet pie pig pin pit poi pol pot pro reg rei rep ret rig rin rip roe rot teg tel ten tie til tin tip toe tog ton top tor

enol ergo gelt gent gien gill gilt girl girn giro girt gite glen glop goer gone gore gorp grin grip grit grot inro into iron leno lent lept lien lier lilo lilt line ling lino lint lion lipe lire lite loge loin lone long lope lore lorn loti nill nite noel noil noir nope nori note ogle ogre open orle pein pelt pent peon peri pert pier pile pill pine ping pint pion pirn plie plot poet pole poll pone pong pore porn port prig prog rein rent repo riel rile rill ring riot ripe rite roil role roll rope rote roti rotl tell tern tier tile till tine ting tire tirl tiro toil tole toll tone tong tope topi tore tori torn trig trio trip trog trop