UNPATENTABLE

aa ab ae al an at ba be el en et la na ne nu pa pe ta un up ut

aal aba ala alb ale alp alt ana ane ant ape apt ate att baa bal ban bap bat bee bel ben bet bun but eat eau eel eta lab lap lat lea lee let leu nab nae nan nap neb nee net nub nun nut pal pan pat pea pee pen pet pub pul pun put tab tae tan tap tat tau tea tee tel ten tet tub tun tup tut uta ute

abet able abut alae alan alba alee anal anna anta ante atap aunt baal bale bane bate batt bean beat beau been beep beet belt bene bent beta blae blat blet blue buna bunn bunt bute butt elan etna lane late latu lean leap leet lent lept lube luna lune lunt lute naan nabe nala nana napa nape neap neat neep nene nett pale pane pant pate peal pean peat peel peen pele pelt pent plan plat plea pleb pula pule puna punt putt tabu tael tala tale tapa tape tate taut teal teat teel teen tela tele tent tepa tuba tube tule tuna tune ulan ulna unbe