-th a-a a-b a-c a-t aaa aab aac aad aah aan aao aar aat ab- aba abb abc abd abh abn abo abr abt ac- aca acb acc acd ach acn aco acr act ad- ada adb adc add adh adn ado adr adt aha ahb ahc ahd ahh ahn aho ahr aht an- ana anb anc and anh ann ano anr ant aoa aob aoc aod aoh aon aoo aor aot ar- ara arb arc ard arh arn aro arr art at- ata atb atc atd ath atn ato atr att baa bab bac bad bah ban bao bar bat bba bbb bbc bbd bbh bbn bbo bbr bbt bca bcb bcc bcd bch bcn bco bcr bct bda bdb bdc bdd bdh bdo bdr bdt bha bhb bhc bhd bhh bho bhr bht bna bnb bnc bnd bnn bno bnr bnt boa bob boc bod boh bon boo bor bot bra brb brd brh brn bro brr brt bta btb btc btd bth btn bto btr btt c-- caa cab cac cad cah can cao car cat cba cbb cbc cbd cbh cbn cbo cbr cbt cca ccb ccc ccd cch ccn cco ccr cct cda cdb cdc cdd cdh cdn cdo cdr cdt ch- cha chb chc chd chh chn cho chr cht cn- cna cnb cnc cnd cnh cnn cno cnr cnt co- coa cob coc cod coh con coo cor cot cra crb crc crd crh crn cro crr crt cta ctb ctc ctd cth ctn cto ctr ctt daa dab dac dad dah dan dao dar dat dba dbb dbc dbd dbh dbn dbo dbr dbt dca dcb dcc dcd dcn dco dcr dct dda ddb ddc ddd ddh ddn ddo ddr ddt dh- dha dhb dhc dhd dhh dho dhr dht dna dnb dnc dnd dnh dnn dno dnr dnt doa dob doc dod doh don doo dor dot dra drb drc drd drn dro drr drt dta dtb dtc dtd dth dtn dto dtr dtt haa hab hac had hah han hao har hat hba hbb hbc hbd hbh hbn hbo hbr hbt hca hcb hcc hcd hch hcn hco hcr hct hda hdb hdc hdd hdh hdn hdo hdr hdt hha hhb hhc hhd hhh hhn hho hhr hht hna hnb hnc hnd hnh hnn hno hnt hoa hob hoc hod hoh hon hoo hor hot hr- hra hrb hrc hrd hrh hrn hro hrr hrt hta htb htc htd hth htn hto htr htt naa nab nac nad nah nan nao nar nat nba nbb nbc nbd nbn nbo nbr nbt nca ncb ncc ncd nch ncn nco ncr nct nda ndb ndc ndd ndh ndn ndo ndr ndt nha nhb nhc nhd nhh nhn nhr nht nna nnb nnc nnh nnn nno nnt no- noa nob noc nod noh non noo nor not nra nrb nrc nrd nrn nro nrr nrt nta ntb ntc ntd nth ntn nto ntr ntt oaa oab oac oad oah oan oao oar oat ob- oba obb obc obd obh obn obo obr obt oc- oca ocb occ ocd och ocn oco ocr oct oda odb odc odd odh odn odo odr odt oha ohc ohd ohh ohn oho ohr oht on- ona onb onc ond onh onn ono onr ont oo- ooa oob ooc ood ooh oon ooo oor oot or- ora orb orc ord orh orn oro orr ort ot- ota otb otc otd oth otn oto otr ott ra- raa rab rac rad rah ran rao rar rat rba rbb rbc rbd rbh rbn rbo rbr rbt rca rcb rcc rcd rch rcn rco rcr rct rda rdb rdc rdd rdh rdn rdo rdr rdt rh- rha rhb rhc rhd rhh rhn rho rhr rht rna rnb rnc rnd rnh rnn rno rnr rnt roa rob roc rod roh ron roo ror rot rra rrb rrc rrd rrh rrn rrr rrt rta rtb rtc rtd rtn rto rtr rtt taa tab tac tad tah tan tao tar tat tba tbb tbc tbd tbh tbn tbo tbr tbt tca tcb tcc tcd tch tcn tco tcr tct tda tdb tdc tdd tdh tdn tdo tdr tdt th- tha thb thc thd thh thn tho thr tht tna tnb tnc tnd tnh tnn tno tnr tnt to- toa tob toc tod toh ton too tor tot tra trb trc trd trh trn tro trr trt tta ttb ttc ttd tth ttn tto ttr ttt