a-a a-b aaa aab aad aak aan aau ab- aba abb abd abk abn abu ad- ada adb add adk adn adu aka akb akd akk akn aku an- ana anb and ank ann anu au- aua aub aud auk aun b-u baa bab bad bak ban bau bba bbb bbd bbk bbn bbu bda bdb bdd bdk bdu bka bkb bkk bkn bna bnb bnd bnk bnn bnu bua bub bud buk bun buu daa dab dad dak dan dau dba dbb dbd dbk dbn dbu dda ddb ddd ddk ddn ddu dka dkb dkk dku dna dnb dnd dnk dnn dua dub dud duk dun ka- kaa kab kad kak kan kau kba kbb kbd kbk kbn kbu kda kdb kdk kdu kkb kkk kkn kku kn- kna knd knk knn knu kub kud kuk kun kuu naa nab nad nak nan nau nba nbb nbd nbk nbn nbu nda ndb ndd ndk ndn ndu nka nkk nkn nku nna nnb nnk nnn nnu nua nub nud nuk nun nuu ua- uaa uab uad uak uan uau uba ubb ubk ubn ubu uda udb udd udk udn udu uka ukb ukk ukn uku un- una unb und unk unn unu uua uun uuu