-er a-a a-b a-t aaa aab aad aae aak aan aar aat aau ab- aba abb abd abe abk abn abr abt abu ad- ada adb add ade adk adn adr adt adu aea aeb aed aee aek aen aer aet aeu aka akb akd ake akk akn akr aku an- ana anb and ane ank ann anr ant anu ar- ara arb ard are ark arn arr art aru at- ata atb atd ate atn atr att atu au- aua aub aud aue auk aun aur aut b-u baa bab bad bae bak ban bar bat bau bba bbb bbd bbe bbk bbn bbr bbt bbu bda bdb bdd bde bdk bdr bdt bdu be- bea beb bed bee bek ben ber bet beu bka bkb bke bkk bkn bkr bkt bna bnb bnd bne bnk bnn bnr bnt bnu bra brb brd bre brk brn brr brt bru bta btb btd bte btk btn btr btt btu bua bub bud bue buk bun bur but buu daa dab dad dae dak dan dar dat dau dba dbb dbd dbe dbk dbn dbr dbt dbu dda ddb ddd dde ddk ddn ddr ddt ddu de- dea deb ded dee dek den der det deu dka dkb dke dkk dkr dkt dku dna dnb dnd dne dnk dnn dnr dnt dra drb drd dre drk drn drr drt dru dta dtb dtd dte dtk dtn dtr dtt dtu dua dub dud due duk dun dur dut eaa eab ead eae eak ean ear eat eau eba ebb ebd ebe ebk ebn ebr ebt ebu ed- eda edb edd ede edk edn edr edt edu eea eeb eed eee eek een eer eet eka ekb ekd eke ekr ekt eku en- ena enb end ene enk enn enr ent enu era erb erd ere erk ern err ert eru eta etb etd ete etk etn etr ett etu eu- eua eub eud eue eun eur eut k-t ka- kaa kab kad kae kak kan kar kat kau kba kbb kbd kbe kbk kbn kbr kbu kda kdb kde kdk kdr kdt kdu ke- kea keb ked kee kek ken ker ket kkb kke kkk kkn kkr kkt kku kn- kna knd kne knk knn knr knt knu kra krd krk krn krr krt kru kta ktb kte ktk ktn ktr ktt ktu kub kud kue kuk kun kur kut kuu naa nab nad nae nak nan nar nat nau nba nbb nbd nbe nbk nbn nbr nbt nbu nda ndb ndd nde ndk ndn ndr ndt ndu ne- nea neb ned nee nek nen ner net neu nka nke nkk nkn nkr nkt nku nna nnb nne nnk nnn nnt nnu nra nrb nrd nre nrk nrn nrr nrt nru nta ntb ntd nte ntk ntn ntr ntt ntu nua nub nud nue nuk nun nur nut nuu ra- raa rab rad rae rak ran rar rat rau rba rbb rbd rbe rbk rbn rbr rbt rbu rda rdb rdd rde rdn rdr rdt rdu re- rea reb red ree rek ren rer ret reu rkb rke rkk rkt rku rna rnb rnd rnn rnr rnt rnu rra rrb rrd rrk rrn rrr rrt rru rta rtb rtd rte rtk rtn rtr rtt rtu rua rub rud rue ruk run rur rut ruu taa tab tad tae tak tan tar tat tau tba tbb tbd tbe tbk tbn tbr tbt tbu tda tdb tdd tde tdk tdn tdr tdt tdu te- tea teb ted tee tek ten ter tet teu tka tkb tke tkk tkr tkt tna tnb tnd tne tnk tnn tnr tnt tra trb trd tre trk trn trr trt tru tta ttb ttd tte ttk ttn ttr ttt ttu tua tub tud tue tuk tun tur tut tuu ua- uaa uab uad uae uak uan uar uat uau uba ubb ube ubk ubn ubr ubt ubu uda udb udd ude udk udn udr udt udu uea ueb ued uee uen uer uet uka ukb uke ukk ukn ukr uku un- una unb und une unk unn unr unt unu ur- ura urb urd ure urk urn urr urt uru uta utb utd ute utk utn utr utt utu uua uue uun uur uut uuu