-th a-a a-b a-t aaa aab aah aak aao aar aas aat ab- aba abb abh abk abo abr abs abt aha ahb ahh ahk aho ahr ahs aht aka akb akh akk ako akr aks aoa aob aoh aok aoo aor aos aot ar- ara arb arh ark aro arr ars art as- asa asb ash ask aso asr ass ast at- ata atb ath ato atr ats att baa bab bah bak bao bar bas bat bba bbb bbh bbk bbo bbr bbs bbt bha bhb bhh bhk bho bhr bhs bht bka bkb bkk bko bkr bks bkt boa bob boh bok boo bor bos bot bra brb brh brk bro brr brs brt bsa bsb bsh bsk bso bsr bss bst bta btb bth btk bto btr bts btt haa hab hah hak hao har has hat hba hbb hbh hbk hbo hbr hbs hbt hha hhb hhh hhk hho hhr hhs hht hka hkb hkh hkk hko hkr hks hkt hoa hob hoh hok hoo hor hos hot hr- hra hrb hrh hrk hro hrr hrs hrt hsa hsb hsh hsk hsr hss hst hta htb hth htk hto htr hts htt k-t ka- kaa kab kah kak kao kar kas kat kba kbb kbh kbk kbo kbr kbs kha khh khk kho khr khs kkb kkh kkk kkr kks kkt koa kob koh kok koo kor kos kot kra krk kro krr krs krt ksa ksb ksh ksk kso ksr kss kst kta ktb kth ktk kto ktr kts ktt oaa oab oah oak oao oar oas oat ob- oba obb obh obk obo obr obs obt oha ohh oho ohr ohs oht oka okb okk oko okr oks oo- ooa oob ooh ook ooo oor oos oot or- ora orb orh ork oro orr ors ort os- osa osb osh osk oso osr oss ost ot- ota otb oth otk oto otr ots ott ra- raa rab rah rak rao rar ras rat rba rbb rbh rbk rbo rbr rbs rbt rh- rha rhb rhh rho rhr rhs rht rkb rkk rko rks rkt roa rob roh rok roo ror ros rot rra rrb rrh rrk rrr rrs rrt rsa rsb rsh rsk rso rsr rss rst rta rtb rtk rto rtr rts rtt saa sab sah sak sao sar sas sat sba sbb sbh sbk sbo sbr sbs sbt sh- sha shb shh shk sho shr shs sht sk- ska skb skh skk sko skr sks skt soa sob soh sok soo sor sos sot sr- sra srb srh srk sro srr srs srt ss- ssa ssb ssh ssk sso ssr sss sst sta stb sth stk sto str sts stt taa tab tah tak tao tar tas tat tba tbb tbh tbk tbo tbr tbs tbt th- tha thb thh thk tho thr ths tht tka tkb tkk tko tkr tks tkt to- toa tob toh tok too tor tos tot tra trb trh trk tro trr trs trt tsa tsb tsh tsk tso tsr tss tst tta ttb tth ttk tto ttr tts ttt