a-a a-b a-t aaa aab aad aak aan aar aas aat ab- aba abb abd abk abn abr abs abt ad- ada adb add adk adn adr ads adt aka akb akd akk akn akr aks an- ana anb and ank ann anr ans ant ar- ara arb ard ark arn arr ars art as- asa asb asd ask asn asr ass ast at- ata atb atd atn atr ats att baa bab bad bak ban bar bas bat bba bbb bbd bbk bbn bbr bbs bbt bda bdb bdd bdk bdr bds bdt bka bkb bkk bkn bkr bks bkt bna bnb bnd bnk bnn bnr bns bnt bra brb brd brk brn brr brs brt bsa bsb bsd bsk bsn bsr bss bst bta btb btd btk btn btr bts btt daa dab dad dak dan dar das dat dba dbb dbd dbk dbn dbr dbs dbt dda ddb ddd ddk ddn ddr dds ddt dka dkb dkk dkr dks dkt dna dnb dnd dnk dnn dnr dns dnt dra drb drd drk drn drr drs drt dsa dsb dsd dsk dsn dsr dss dst dta dtb dtd dtk dtn dtr dts dtt k-t ka- kaa kab kad kak kan kar kas kat kba kbb kbd kbk kbn kbr kbs kda kdb kdk kdr kds kdt kkb kkk kkn kkr kks kkt kn- kna knd knk knn knr knt kra krd krk krn krr krs krt ksa ksb ksd ksk ksn ksr kss kst kta ktb ktk ktn ktr kts ktt naa nab nad nak nan nar nas nat nba nbb nbd nbk nbn nbr nbs nbt nda ndb ndd ndk ndn ndr nds ndt nka nkk nkn nkr nks nkt nna nnb nnk nnn nns nnt nra nrb nrd nrk nrn nrr nrs nrt nsa nsb nsd nsk nsn nsr nss nst nta ntb ntd ntk ntn ntr nts ntt ra- raa rab rad rak ran rar ras rat rba rbb rbd rbk rbn rbr rbs rbt rda rdb rdd rdn rdr rds rdt rkb rkk rks rkt rna rnb rnd rnn rnr rns rnt rra rrb rrd rrk rrn rrr rrs rrt rsa rsb rsd rsk rsn rsr rss rst rta rtb rtd rtk rtn rtr rts rtt saa sab sad sak san sar sas sat sba sbb sbd sbk sbn sbr sbs sbt sda sdb sdd sdk sdn sdr sds sdt sk- ska skb skd skk skr sks skt sna snb snd snk snn snr sns snt sr- sra srb srd srk srn srr srs srt ss- ssa ssb ssd ssk ssn ssr sss sst sta stb std stk stn str sts stt taa tab tad tak tan tar tas tat tba tbb tbd tbk tbn tbr tbs tbt tda tdb tdd tdk tdn tdr tds tdt tka tkb tkk tkr tks tkt tna tnb tnd tnk tnn tnr tns tnt tra trb trd trk trn trr trs trt tsa tsb tsd tsk tsn tsr tss tst tta ttb ttd ttk ttn ttr tts ttt