a-a a-b a-i aaa aab aaf aai aak aan aar aau ab- aba abb abf abi abk abn abr abu af- afa afb aff afi afk afn afr afu ai- aia aib aif aii aik ain air aiu aka akb aki akk akn akr aku an- ana anb anf ani ank ann anr anu ar- ara arb arf ari ark arn arr aru au- aua aub auf aui auk aun aur b-u baa bab baf bai bak ban bar bau bba bbb bbf bbi bbk bbn bbr bbu bfa bfb bff bfi bfn bfr bfu bi- bia bib bif bii bik bin bir biu bka bkb bkf bkk bkn bkr bna bnb bnf bni bnk bnn bnr bnu bra brb brf bri brk brn brr bru bua bub buf bui buk bun bur buu faa fab faf fai fak fan far fau fba fbb fbf fbi fbk fbn fbr fbu ffa fff ffi ffk ffn ffr ffu fia fib fif fii fik fin fir fiu fka fkb fkf fki fkk fna fnb fnf fni fnk fnn fnr fnu fra frb frf fri frk frn frr fru fua fub fuf fui fuk fun fur fuu i-f ia- iaa iab iaf iai ian iar iau iba ibb ibf ibi ibk ibn ibr ibu ifa ifb iff ifi ifn ifr ifu iia iib iif iii iin iir iiu ika ikb ikf iki ikk ikr iku in- ina inb inf ini ink inn inr inu ir- ira irb irf iri irk irn irr iru iu- iua iub iui iur ka- kaa kab kaf kai kak kan kar kau kba kbb kbf kbi kbk kbn kbr kbu kfa kff kfi kfu kia kib kif kii kik kin kir kiu kkb kki kkk kkn kkr kku kn- kna knf kni knk knn knr knu kra krf kri krk krn krr kru kub kui kuk kun kur kuu n-i naa nab naf nai nak nan nar nau nba nbb nbf nbi nbk nbn nbr nbu nfa nfb nff nfi nfk nfn nfr nfu nia nib nif nii nik nin nir niu nka nkf nki nkk nkn nkr nku nna nnb nnf nni nnk nnn nnu nra nrb nrf nri nrk nrn nrr nru nua nub nui nuk nun nur nuu ra- raa rab raf rai rak ran rar rau rba rbb rbf rbi rbk rbn rbr rbu rfa rfb rff rfi rfk rfn rfr rfu ria rib rif rii rik rin rir rkb rkf rkk rku rna rnb rni rnn rnr rnu rra rrb rrf rri rrk rrn rrr rru rua rub ruf rui ruk run rur ruu ua- uaa uab uaf uai uak uan uar uau uba ubb ubf ubi ubk ubn ubr ubu ufa uff ufi ufn ufr ufu uia uib uif uii uin uir uiu uka ukb ukf uki ukk ukn ukr uku un- una unb unf uni unk unn unr unu ur- ura urb urf uri urk urn urr uru uua uun uur uuu