-ic a-a a-b a-c a-i aaa aab aac aah aai aak aan aao aar aas ab- aba abb abc abh abi abk abn abo abr abs ac- aca acb acc ach aci ack acn aco acr acs aha ahb ahc ahh ahi ahk ahn aho ahr ahs ai- aia aib aic aih aii aik ain aio air ais aka akb akc akh aki akk akn ako akr aks an- ana anb anc anh ani ank ann ano anr ans aoa aob aoc aoh aoi aok aon aoo aor aos ar- ara arb arc arh ari ark arn aro arr ars as- asa asb asc ash asi ask asn aso asr ass baa bab bac bah bai bak ban bao bar bas bba bbb bbc bbh bbi bbk bbn bbo bbr bbs bca bcb bcc bch bci bck bcn bco bcr bcs bha bhb bhc bhh bhi bhk bho bhr bhs bi- bia bib bic bih bii bik bin bio bir bis bka bkb bkc bkk bkn bko bkr bks bna bnb bnc bni bnk bnn bno bnr bns boa bob boc boh boi bok bon boo bor bos bra brb brh bri brk brn bro brr brs bsa bsb bsc bsh bsi bsk bsn bso bsr bss c-- caa cab cac cah cai cak can cao car cas cba cbb cbc cbh cbi cbk cbn cbo cbr cbs cca ccb ccc cch cci cck ccn cco ccr ccs ch- cha chb chc chh chi chk chn cho chr chs ci- cia cib cic cih cii cik cin cio cir cis cka ckb ckc ckh cki cko cks cn- cna cnb cnc cnh cni cnn cno cnr cns co- coa cob coc coh coi cok con coo cor cos cra crb crc crh cri crk crn cro crr crs csa csb csc csh csi csk csn cso csr css h-i haa hab hac hah hai hak han hao har has hba hbb hbc hbh hbi hbk hbn hbo hbr hbs hca hcb hcc hch hci hck hcn hco hcr hcs hha hhb hhc hhh hhi hhk hhn hho hhr hhs hia hib hic hih hii hik hin hio hir his hka hkb hkh hki hkk hkn hko hkr hks hna hnb hnc hnh hnk hnn hno hns hoa hob hoc hoh hoi hok hon hoo hor hos hr- hra hrb hrc hrh hri hrk hrn hro hrr hrs hsa hsb hsc hsh hsi hsk hsn hsr hss ia- iaa iab iac iah iai ian iao iar ias iba ibb ibc ibh ibi ibk ibn ibo ibr ibs ica icb icc ich ici ick icn ico icr ics iha ihb ihc ihh ihi ihk ihn iho ihr ihs iia iib iic iih iii iin iio iir iis ika ikb ikc iki ikk iko ikr iks in- ina inb inc inh ini ink inn ino inr ins io- ioa iob ioc ioh ioi ion ioo ior ios ir- ira irb irc iri irk irn iro irr irs is- isa isb isc ish isi isk isn iso isr iss ka- kaa kab kac kah kai kak kan kao kar kas kba kbb kbc kbh kbi kbk kbn kbo kbr kbs kca kcb kcc kch kci kck kcn kcr kcs kha khh khi khk khn kho khr khs kia kib kic kih kii kik kin kio kir kis kkb kkc kkh kki kkk kkn kkr kks kn- kna knc kni knk knn kno knr koa kob koc koh koi kok kon koo kor kos kra krc kri krk krn kro krr krs ksa ksb ksc ksh ksi ksk ksn kso ksr kss n-i naa nab nac nah nai nak nan nao nar nas nba nbb nbc nbi nbk nbn nbo nbr nbs nca ncb ncc nch nci nck ncn nco ncr ncs nha nhb nhc nhh nhi nhk nhn nhr nhs nia nib nic nih nii nik nin nio nir nis nka nkc nki nkk nkn nko nkr nks nna nnb nnc nnh nni nnk nnn nno nns no- noa nob noc noh noi nok non noo nor nos nra nrb nrc nri nrk nrn nro nrr nrs nsa nsb nsc nsh nsi nsk nsn nso nsr nss o-i oaa oab oac oah oai oak oan oao oar oas ob- oba obb obc obh obi obk obn obo obr obs oc- oca ocb occ och oci ock ocn oco ocr ocs oha ohc ohh ohi ohn oho ohr ohs oia oib oic oii oik oin oio oir ois oka okb okc oki okk oko okr oks on- ona onb onc onh oni onk onn ono onr ons oo- ooa oob ooc ooh ooi ook oon ooo oor oos or- ora orb orc orh ori ork orn oro orr ors os- osa osb osc osh osi osk osn oso osr oss ra- raa rab rac rah rai rak ran rao rar ras rba rbb rbc rbh rbi rbk rbn rbo rbr rbs rca rcb rcc rch rci rcn rco rcr rcs rh- rha rhb rhc rhh rhi rhn rho rhr rhs ria rib ric rih rii rik rin rio rir ris rkb rkc rkk rko rks rna rnb rnc rnh rni rnn rno rnr rns roa rob roc roh roi rok ron roo ror ros rra rrb rrc rrh rri rrk rrn rrr rrs rsa rsb rsc rsh rsi rsk rsn rso rsr rss saa sab sac sah sai sak san sao sar sas sba sbb sbc sbh sbi sbk sbn sbo sbr sbs sca scb scc sch sci sck scn sco scr scs sh- sha shb shc shh shi shk shn sho shr shs sia sib sic sih sii sik sin sio sir sis sk- ska skb skc skh ski skk sko skr sks sna snb snc sni snk snn sno snr sns soa sob soc soh soi sok son soo sor sos sr- sra srb src srh sri srk srn sro srr srs ss- ssa ssb ssc ssh ssi ssk ssn sso ssr sss