UNOPTIONAL

ai al an at in it la li lo na no nu oi on op pa pi ta ti to un up ut

ail ain ait alp alt ani ant apo apt inn ion lap lat lin lip lit loo lop lot nan nap nil nip nit noo not nun nut oat oil ono oot opt out pal pan pat pia pin pit piu poi pol poo pot pul pun put tan tao tap tau til tin tip ton too top tui tun tup upo uta

alit alto anil anon anti atop aunt auto into iota lain lati latu linn lino lint lion lipa litu loan loin loon loop loot lota loti loup lout luna lunt nail naoi nipa noil nolo nona noon nota noun olio onto opal pail pain pant pial pian pina pint pion pita plan plat plot polo pool poon pout ptui pula puli puna punt tail tain tali toil tola tolu tool toon topi topo tuna ulan ulna unai unit unto upon