a-a a-b a-i aaa aab aad aai aak aan aar ab- aba abb abd abi abk abn abr ad- ada adb add adi adk adn adr ai- aia aib aid aii aik ain air aka akb akd aki akk akn akr an- ana anb and ani ank ann anr ar- ara arb ard ari ark arn arr baa bab bad bai bak ban bar bba bbb bbd bbi bbk bbn bbr bda bdb bdd bdi bdk bdr bi- bia bib bid bii bik bin bir bka bkb bkk bkn bkr bna bnb bnd bni bnk bnn bnr bra brb brd bri brk brn brr daa dab dad dai dak dan dar dba dbb dbd dbi dbk dbn dbr dda ddb ddd ddi ddk ddn ddr di- dia dib did dii dik din dir dka dkb dki dkk dkr dna dnb dnd dni dnk dnn dnr dra drb drd dri drk drn drr i-d ia- iaa iab iad iai ian iar iba ibb ibd ibi ibk ibn ibr ida idb idd idi idk idn idr iia iib iid iii iin iir ika ikb iki ikk ikr in- ina inb ind ini ink inn inr ir- ira irb ird iri irk irn irr ka- kaa kab kad kai kak kan kar kba kbb kbd kbi kbk kbn kbr kda kdb kdk kdr kia kib kid kii kik kin kir kkb kki kkk kkn kkr kn- kna knd kni knk knn knr kra krd kri krk krn krr n-i naa nab nad nai nak nan nar nba nbb nbd nbi nbk nbn nbr nda ndb ndd ndi ndk ndn ndr nia nib nid nii nik nin nir nka nki nkk nkn nkr nna nnb nni nnk nnn nra nrb nrd nri nrk nrn nrr ra- raa rab rad rai rak ran rar rba rbb rbd rbi rbk rbn rbr rda rdb rdd rdi rdn rdr ria rib rid rii rik rin rir rkb rkk rna rnb rnd rni rnn rnr rra rrb rrd rri rrk rrn rrr