-th a-a a-b a-c a-t aaa aab aac aad aah aak aan aao aas aat ab- aba abb abc abd abh abk abn abo abs abt ac- aca acb acc acd ach ack acn aco acs act ad- ada adb adc add adh adk adn ado ads adt aha ahb ahc ahd ahh ahk ahn aho ahs aht aka akb akc akd akh akk akn ako aks an- ana anb anc and anh ank ann ano ans ant aoa aob aoc aod aoh aok aon aoo aos aot as- asa asb asc asd ash ask asn aso ass ast at- ata atb atc atd ath atn ato ats att baa bab bac bad bah bak ban bao bas bat bba bbb bbc bbd bbh bbk bbn bbo bbs bbt bca bcb bcc bcd bch bck bcn bco bcs bct bda bdb bdc bdd bdh bdk bdo bds bdt bha bhb bhc bhd bhh bhk bho bhs bht bka bkb bkc bkk bkn bko bks bkt bna bnb bnc bnd bnk bnn bno bns bnt boa bob boc bod boh bok bon boo bos bot bsa bsb bsc bsd bsh bsk bsn bso bss bst bta btb btc btd bth btk btn bto bts btt c-- caa cab cac cad cah cak can cao cas cat cba cbb cbc cbd cbh cbk cbn cbo cbs cbt cca ccb ccc ccd cch cck ccn cco ccs cct cda cdb cdc cdd cdh cdk cdn cdo cds cdt ch- cha chb chc chd chh chk chn cho chs cht cka ckb ckc ckd ckh cko cks ckt cn- cna cnb cnc cnd cnh cnn cno cns cnt co- coa cob coc cod coh cok con coo cos cot csa csb csc csd csh csk csn cso css cst cta ctb ctc ctd cth ctk ctn cto cts ctt daa dab dac dad dah dak dan dao das dat dba dbb dbc dbd dbh dbk dbn dbo dbs dbt dca dcb dcc dcd dck dcn dco dcs dct dda ddb ddc ddd ddh ddk ddn ddo dds ddt dh- dha dhb dhc dhd dhh dhk dho dhs dht dka dkb dkc dkk dko dks dkt dna dnb dnc dnd dnh dnk dnn dno dns dnt doa dob doc dod doh dok don doo dos dot dsa dsb dsc dsd dsh dsk dsn dso dss dst dta dtb dtc dtd dth dtk dtn dto dts dtt haa hab hac had hah hak han hao has hat hba hbb hbc hbd hbh hbk hbn hbo hbs hbt hca hcb hcc hcd hch hck hcn hco hcs hct hda hdb hdc hdd hdh hdk hdn hdo hds hdt hha hhb hhc hhd hhh hhk hhn hho hhs hht hka hkb hkd hkh hkk hkn hko hks hkt hna hnb hnc hnd hnh hnk hnn hno hns hnt hoa hob hoc hod hoh hok hon hoo hos hot hsa hsb hsc hsd hsh hsk hsn hss hst hta htb htc htd hth htk htn hto hts htt k-t ka- kaa kab kac kad kah kak kan kao kas kat kba kbb kbc kbd kbh kbk kbn kbo kbs kca kcb kcc kcd kch kck kcn kcs kct kda kdb kdc kdh kdk kdo kds kdt kha khh khk khn kho khs kkb kkc kkh kkk kkn kks kkt kn- kna knc knd knk knn kno knt koa kob koc kod koh kok kon koo kos kot ksa ksb ksc ksd ksh ksk ksn kso kss kst kta ktb ktc kth ktk ktn kto kts ktt naa nab nac nad nah nak nan nao nas nat nba nbb nbc nbd nbk nbn nbo nbs nbt nca ncb ncc ncd nch nck ncn nco ncs nct nda ndb ndc ndd ndh ndk ndn ndo nds ndt nha nhb nhc nhd nhh nhk nhn nhs nht nka nkc nkk nkn nko nks nkt nna nnb nnc nnh nnk nnn nno nns nnt no- noa nob noc nod noh nok non noo nos not nsa nsb nsc nsd nsh nsk nsn nso nss nst nta ntb ntc ntd nth ntk ntn nto nts ntt oaa oab oac oad oah oak oan oao oas oat ob- oba obb obc obd obh obk obn obo obs obt oc- oca ocb occ ocd och ock ocn oco ocs oct oda odb odc odd odh odn odo ods odt oha ohc ohd ohh ohn oho ohs oht oka okb okc okd okk oko oks on- ona onb onc ond onh onk onn ono ons ont oo- ooa oob ooc ood ooh ook oon ooo oos oot os- osa osb osc osd osh osk osn oso oss ost ot- ota otb otc otd oth otk otn oto ots ott saa sab sac sad sah sak san sao sas sat sba sbb sbc sbd sbh sbk sbn sbo sbs sbt sca scb scc scd sch sck scn sco scs sct sda sdb sdc sdd sdh sdk sdn sdo sds sdt sh- sha shb shc shd shh shk shn sho shs sht sk- ska skb skc skd skh skk sko sks skt sna snb snc snd snk snn sno sns snt soa sob soc sod soh sok son soo sos sot ss- ssa ssb ssc ssd ssh ssk ssn sso sss sst sta stb stc std sth stk stn sto sts stt taa tab tac tad tah tak tan tao tas tat tba tbb tbc tbd tbh tbk tbn tbo tbs tbt tca tcb tcc tcd tch tck tcn tco tcs tct tda tdb tdc tdd tdh tdk tdn tdo tds tdt th- tha thb thc thd thh thk thn tho ths tht tka tkb tkc tkk tko tks tkt tna tnb tnc tnd tnh tnk tnn tno tns tnt to- toa tob toc tod toh tok ton too tos tot tsa tsb tsc tsd tsh tsk tsn tso tss tst tta ttb ttc ttd tth ttk ttn tto tts ttt