a-a a-b a-t aaa aab aad aan aao aar aas aat aau ab- aba abb abd abn abo abr abs abt abu ad- ada adb add adn ado adr ads adt adu an- ana anb and ann ano anr ans ant anu aoa aob aod aon aoo aor aos aot aou ar- ara arb ard arn aro arr ars art aru as- asa asb asd asn aso asr ass ast asu at- ata atb atd atn ato atr ats att atu au- aua aub aud aun auo aur aus aut b-u baa bab bad ban bao bar bas bat bau bba bbb bbd bbn bbo bbr bbs bbt bbu bda bdb bdd bdo bdr bds bdt bdu bna bnb bnd bnn bno bnr bns bnt bnu boa bob bod bon boo bor bos bot bou bra brb brd brn bro brr brs brt bru bsa bsb bsd bsn bso bsr bss bst bsu bta btb btd btn bto btr bts btt btu bua bub bud bun buo bur bus but buu daa dab dad dan dao dar das dat dau dba dbb dbd dbn dbo dbr dbs dbt dbu dda ddb ddd ddn ddo ddr dds ddt ddu dna dnb dnd dnn dno dnr dns dnt doa dob dod don doo dor dos dot dou dra drb drd drn dro drr drs drt dru dsa dsb dsd dsn dso dsr dss dst dsu dta dtb dtd dtn dto dtr dts dtt dtu dua dub dud dun duo dur dus dut naa nab nad nan nao nar nas nat nau nba nbb nbd nbn nbo nbr nbs nbt nbu nda ndb ndd ndn ndo ndr nds ndt ndu nna nnb nnn nno nns nnt nnu no- noa nob nod non noo nor nos not nou nra nrb nrd nrn nro nrr nrs nrt nru nsa nsb nsd nsn nso nsr nss nst nsu nta ntb ntd ntn nto ntr nts ntt ntu nua nub nud nun nuo nur nus nut nuu oaa oab oad oan oao oar oas oat oau ob- oba obb obd obn obo obr obs obt obu oda odb odd odn odo odr ods odt odu on- ona onb ond onn ono onr ons ont onu oo- ooa oob ood oon ooo oor oos oot or- ora orb ord orn oro orr ors ort oru os- osa osb osd osn oso osr oss ost osu ot- ota otb otd otn oto otr ots ott otu ou- oua oud oun ouo our ous out ra- raa rab rad ran rao rar ras rat rau rba rbb rbd rbn rbo rbr rbs rbt rbu rda rdb rdd rdn rdo rdr rds rdt rdu rna rnb rnd rnn rno rnr rns rnt rnu roa rob rod ron roo ror ros rot rou rra rrb rrd rrn rrr rrs rrt rru rsa rsb rsd rsn rso rsr rss rst rsu rta rtb rtd rtn rto rtr rts rtt rtu rua rub rud run ruo rur rus rut ruu saa sab sad san sao sar sas sat sau sba sbb sbd sbn sbo sbr sbs sbt sbu sda sdb sdd sdn sdo sdr sds sdt sdu sna snb snd snn sno snr sns snt snu soa sob sod son soo sor sos sot sou sr- sra srb srd srn sro srr srs srt ss- ssa ssb ssd ssn sso ssr sss sst ssu sta stb std stn sto str sts stt stu sua sub sud sun suo sur sus sut suu taa tab tad tan tao tar tas tat tau tba tbb tbd tbn tbo tbr tbs tbt tbu tda tdb tdd tdn tdo tdr tds tdt tdu tna tnb tnd tnn tno tnr tns tnt to- toa tob tod ton too tor tos tot tou tra trb trd trn tro trr trs trt tru tsa tsb tsd tsn tso tsr tss tst tsu tta ttb ttd ttn tto ttr tts ttt ttu tua tub tud tun tuo tur tus tut tuu ua- uaa uab uad uan uao uar uas uat uau uba ubb ubn ubo ubr ubs ubt ubu uda udb udd udn udo udr uds udt udu un- una unb und unn uno unr uns unt unu uoa uob uod uon uoo uor uos uot ur- ura urb urd urn uro urr urs urt uru usa usb usd usn uso usr uss ust usu uta utb utd utn uto utr uts utt utu uua uun uur uus uut uuu