-th a-a a-b a-c a-t aaa aab aac aah aak aan aao aar aat ab- aba abb abc abh abk abn abo abr abt ac- aca acb acc ach ack acn aco acr act aha ahb ahc ahh ahk ahn aho ahr aht aka akb akc akh akk akn ako akr an- ana anb anc anh ank ann ano anr ant aoa aob aoc aoh aok aon aoo aor aot ar- ara arb arc arh ark arn aro arr art at- ata atb atc ath atn ato atr att baa bab bac bah bak ban bao bar bat bba bbb bbc bbh bbk bbn bbo bbr bbt bca bcb bcc bch bck bcn bco bcr bct bha bhb bhc bhh bhk bho bhr bht bka bkb bkc bkk bkn bko bkr bkt bna bnb bnc bnk bnn bno bnr bnt boa bob boc boh bok bon boo bor bot bra brb brh brk brn bro brr brt bta btb btc bth btk btn bto btr btt c-- caa cab cac cah cak can cao car cat cba cbb cbc cbh cbk cbn cbo cbr cbt cca ccb ccc cch cck ccn cco ccr cct ch- cha chb chc chh chk chn cho chr cht cka ckb ckc ckh cko ckt cn- cna cnb cnc cnh cnn cno cnr cnt co- coa cob coc coh cok con coo cor cot cra crb crc crh crk crn cro crr crt cta ctb ctc cth ctk ctn cto ctr ctt haa hab hac hah hak han hao har hat hba hbb hbc hbh hbk hbn hbo hbr hbt hca hcb hcc hch hck hcn hco hcr hct hha hhb hhc hhh hhk hhn hho hhr hht hka hkb hkh hkk hkn hko hkr hkt hna hnb hnc hnh hnk hnn hno hnt hoa hob hoc hoh hok hon hoo hor hot hr- hra hrb hrc hrh hrk hrn hro hrr hrt hta htb htc hth htk htn hto htr htt k-t ka- kaa kab kac kah kak kan kao kar kat kba kbb kbc kbh kbk kbn kbo kbr kca kcb kcc kch kck kcn kcr kct kha khh khk khn kho khr kkb kkc kkh kkk kkn kkr kkt kn- kna knc knk knn kno knr knt koa kob koc koh kok kon koo kor kot kra krc krk krn kro krr krt kta ktb ktc kth ktk ktn kto ktr ktt naa nab nac nah nak nan nao nar nat nba nbb nbc nbk nbn nbo nbr nbt nca ncb ncc nch nck ncn nco ncr nct nha nhb nhc nhh nhk nhn nhr nht nka nkc nkk nkn nko nkr nkt nna nnb nnc nnh nnk nnn nno nnt no- noa nob noc noh nok non noo nor not nra nrb nrc nrk nrn nro nrr nrt nta ntb ntc nth ntk ntn nto ntr ntt oaa oab oac oah oak oan oao oar oat ob- oba obb obc obh obk obn obo obr obt oc- oca ocb occ och ock ocn oco ocr oct oha ohc ohh ohn oho ohr oht oka okb okc okk oko okr on- ona onb onc onh onk onn ono onr ont oo- ooa oob ooc ooh ook oon ooo oor oot or- ora orb orc orh ork orn oro orr ort ot- ota otb otc oth otk otn oto otr ott ra- raa rab rac rah rak ran rao rar rat rba rbb rbc rbh rbk rbn rbo rbr rbt rca rcb rcc rch rcn rco rcr rct rh- rha rhb rhc rhh rhn rho rhr rht rkb rkc rkk rko rkt rna rnb rnc rnh rnn rno rnr rnt roa rob roc roh rok ron roo ror rot rra rrb rrc rrh rrk rrn rrr rrt rta rtb rtc rtk rtn rto rtr rtt taa tab tac tah tak tan tao tar tat tba tbb tbc tbh tbk tbn tbo tbr tbt tca tcb tcc tch tck tcn tco tcr tct th- tha thb thc thh thk thn tho thr tht tka tkb tkc tkk tko tkr tkt tna tnb tnc tnh tnk tnn tno tnr tnt to- toa tob toc toh tok ton too tor tot tra trb trc trh trk trn tro trr trt tta ttb ttc tth ttk ttn tto ttr ttt