a-a a-b aaa aab aad aag aan aao aar aau ab- aba abb abd abg abn abo abr abu ad- ada adb add adg adn ado adr adu ag- aga agb agd agg agn ago agr agu an- ana anb and ang ann ano anr anu aoa aob aod aog aon aoo aor aou ar- ara arb ard arg arn aro arr aru au- aua aub aud aug aun auo aur b-u baa bab bad bag ban bao bar bau bba bbb bbd bbg bbn bbo bbr bbu bda bdb bdd bdg bdo bdr bdu bga bgb bgd bgg bgn bgo bgr bgu bna bnb bnd bng bnn bno bnr bnu boa bob bod bog bon boo bor bou bra brb brd brg brn bro brr bru bua bub bud bug bun buo bur buu daa dab dad dag dan dao dar dau dba dbb dbd dbg dbn dbo dbr dbu dda ddb ddd ddg ddn ddo ddr ddu dga dgd dgg dgn dgr dgu dna dnb dnd dng dnn dno dnr doa dob dod dog don doo dor dou dra drb drd drg drn dro drr dru dua dub dud dug dun duo dur g-d gaa gab gad gag gan gao gar gau gba gbd gbg gbn gbo gbr gbu gda gdb gdd gdn gdo gdr gdu gga ggb ggd ggg ggn ggo ggr ggu gna gnb gnd gnn gno gnr gnu goa gob god gog gon goo gor gou gra grb grd grg grn gro grr gru gu- gua gub gud gug gun guo gur guu naa nab nad nag nan nao nar nau nba nbb nbd nbg nbn nbo nbr nbu nda ndb ndd ndg ndn ndo ndr ndu nga ngb ngd ngg ngn ngo ngu nna nnb nng nnn nno nnu no- noa nob nod nog non noo nor nou nra nrb nrd nrg nrn nro nrr nru nua nub nud nug nun nuo nur nuu oaa oab oad oag oan oao oar oau ob- oba obb obd obg obn obo obr obu oda odb odd odg odn odo odr odu oga ogd ogg ogn ogo on- ona onb ond ong onn ono onr onu oo- ooa oob ood oog oon ooo oor or- ora orb ord org orn oro orr oru ou- oua oud oun ouo our ra- raa rab rad rag ran rao rar rau rba rbb rbd rbg rbn rbo rbr rbu rda rdb rdd rdg rdn rdo rdr rdu rga rgb rgd rgg rgn rgo rgr rna rnb rnd rng rnn rno rnr rnu roa rob rod rog ron roo ror rou rra rrb rrd rrg rrn rrr rru rua rub rud rug run ruo rur ruu ua- uaa uab uad uag uan uao uar uau uba ubb ubg ubn ubo ubr ubu uda udb udd udg udn udo udr udu uga ugb ugg ugn ugo ugr ugu un- una unb und ung unn uno unr unu uoa uob uod uog uon uoo uor ur- ura urb urd urg urn uro urr uru uua uug uun uur uuu