-th a-a a-b a-c a-t aaa aab aac aah aak aan aao aas aat ab- aba abb abc abh abk abn abo abs abt ac- aca acb acc ach ack acn aco acs act aha ahb ahc ahh ahk ahn aho ahs aht aka akb akc akh akk akn ako aks an- ana anb anc anh ank ann ano ans ant aoa aob aoc aoh aok aon aoo aos aot as- asa asb asc ash ask asn aso ass ast at- ata atb atc ath atn ato ats att baa bab bac bah bak ban bao bas bat bba bbb bbc bbh bbk bbn bbo bbs bbt bca bcb bcc bch bck bcn bco bcs bct bha bhb bhc bhh bhk bho bhs bht bka bkb bkc bkk bkn bko bks bkt bna bnb bnc bnk bnn bno bns bnt boa bob boc boh bok bon boo bos bot bsa bsb bsc bsh bsk bsn bso bss bst bta btb btc bth btk btn bto bts btt c-- caa cab cac cah cak can cao cas cat cba cbb cbc cbh cbk cbn cbo cbs cbt cca ccb ccc cch cck ccn cco ccs cct ch- cha chb chc chh chk chn cho chs cht cka ckb ckc ckh cko cks ckt cn- cna cnb cnc cnh cnn cno cns cnt co- coa cob coc coh cok con coo cos cot csa csb csc csh csk csn cso css cst cta ctb ctc cth ctk ctn cto cts ctt haa hab hac hah hak han hao has hat hba hbb hbc hbh hbk hbn hbo hbs hbt hca hcb hcc hch hck hcn hco hcs hct hha hhb hhc hhh hhk hhn hho hhs hht hka hkb hkh hkk hkn hko hks hkt hna hnb hnc hnh hnk hnn hno hns hnt hoa hob hoc hoh hok hon hoo hos hot hsa hsb hsc hsh hsk hsn hss hst hta htb htc hth htk htn hto hts htt k-t ka- kaa kab kac kah kak kan kao kas kat kba kbb kbc kbh kbk kbn kbo kbs kca kcb kcc kch kck kcn kcs kct kha khh khk khn kho khs kkb kkc kkh kkk kkn kks kkt kn- kna knc knk knn kno knt koa kob koc koh kok kon koo kos kot ksa ksb ksc ksh ksk ksn kso kss kst kta ktb ktc kth ktk ktn kto kts ktt naa nab nac nah nak nan nao nas nat nba nbb nbc nbk nbn nbo nbs nbt nca ncb ncc nch nck ncn nco ncs nct nha nhb nhc 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 noh nok non noo nos not nsa nsb nsc nsh nsk nsn nso nss nst nta ntb ntc nth ntk ntn nto nts ntt oaa oab oac oah oak oan oao oas oat ob- oba obb obc obh obk obn obo obs obt oc- oca ocb occ och ock ocn oco ocs oct oha ohc ohh ohn oho ohs oht oka okb okc okk oko oks on- ona onb onc onh onk onn ono ons ont oo- ooa oob ooc ooh ook oon ooo oos oot os- osa osb osc osh osk osn oso oss ost ot- ota otb otc oth otk otn oto ots ott saa sab sac sah sak san sao sas sat sba sbb sbc sbh sbk sbn sbo sbs sbt sca scb scc sch sck scn sco scs sct sh- sha shb shc shh shk shn sho shs sht sk- ska skb skc skh skk sko sks skt sna snb snc snk snn sno sns snt soa sob soc soh sok son soo sos sot ss- ssa ssb ssc ssh ssk ssn sso sss sst sta stb stc sth stk stn sto sts stt taa tab tac tah tak tan tao tas tat tba tbb tbc tbh tbk tbn tbo tbs tbt tca tcb tcc tch tck tcn tco tcs tct th- tha thb thc thh thk thn tho ths tht tka tkb tkc tkk tko tks tkt tna tnb tnc tnh tnk tnn tno tns tnt to- toa tob toc toh tok ton too tos tot tsa tsb tsc tsh tsk tsn tso tss tst tta ttb ttc tth ttk ttn tto tts ttt