-th a-a a-b a-t aaa aab aah aan aao aar aas aat ab- aba abb abh abn abo abr abs abt aha ahb ahh ahn aho ahr ahs aht an- ana anb anh ann ano anr ans ant aoa aob aoh aon aoo aor aos aot ar- ara arb arh arn aro arr ars art as- asa asb ash asn aso asr ass ast at- ata atb ath atn ato atr ats att baa bab bah ban bao bar bas bat bba bbb bbh bbn bbo bbr bbs bbt bha bhb bhh bho bhr bhs bht bna bnb bnn bno bnr bns bnt boa bob boh bon boo bor bos bot bra brb brh brn bro brr brs brt bsa bsb bsh bsn bso bsr bss bst bta btb bth btn bto btr bts btt haa hab hah han hao har has hat hba hbb hbh hbn hbo hbr hbs hbt hha hhb hhh hhn hho hhr hhs hht hna hnb hnh hnn hno hns hnt hoa hob hoh hon hoo hor hos hot hr- hra hrb hrh hrn hro hrr hrs hrt hsa hsb hsh hsn hsr hss hst hta htb hth htn hto htr hts htt naa nab nah nan nao nar nas nat nba nbb nbn nbo nbr nbs nbt nha nhb nhh nhn nhr nhs nht nna nnb nnh nnn nno nns nnt no- noa nob noh non noo nor nos not nra nrb nrn nro nrr nrs nrt nsa nsb nsh nsn nso nsr nss nst nta ntb nth ntn nto ntr nts ntt oaa oab oah oan oao oar oas oat ob- oba obb obh obn obo obr obs obt oha ohh ohn oho ohr ohs oht on- ona onb onh onn ono onr ons ont oo- ooa oob ooh oon ooo oor oos oot or- ora orb orh orn oro orr ors ort os- osa osb osh osn oso osr oss ost ot- ota otb oth otn oto otr ots ott ra- raa rab rah ran rao rar ras rat rba rbb rbh rbn rbo rbr rbs rbt rh- rha rhb rhh rhn rho rhr rhs rht rna rnb rnh rnn rno rnr rns rnt roa rob roh ron roo ror ros rot rra rrb rrh rrn rrr rrs rrt rsa rsb rsh rsn rso rsr rss rst rta rtb rtn rto rtr rts rtt saa sab sah san sao sar sas sat sba sbb sbh sbn sbo sbr sbs sbt sh- sha shb shh shn sho shr shs sht sna snb snn sno snr sns snt soa sob soh son soo sor sos sot sr- sra srb srh srn sro srr srs srt ss- ssa ssb ssh ssn sso ssr sss sst sta stb sth stn sto str sts stt taa tab tah tan tao tar tas tat tba tbb tbh tbn tbo tbr tbs tbt th- tha thb thh thn tho thr ths tht tna tnb tnh tnn tno tnr tns tnt to- toa tob toh ton too tor tos tot tra trb trh trn tro trr trs trt tsa tsb tsh tsn tso tsr tss tst tta ttb tth ttn tto ttr tts ttt