-ic a-a a-b a-c a-i aaa aab aac aah aai aak aan aao aas ab- aba abb abc abh abi abk abn abo abs ac- aca acb acc ach aci ack acn aco acs aha ahb ahc ahh ahi ahk ahn aho ahs ai- aia aib aic aih aii aik ain aio ais aka akb akc akh aki akk akn ako aks an- ana anb anc anh ani ank ann ano ans aoa aob aoc aoh aoi aok aon aoo aos as- asa asb asc ash asi ask asn aso ass baa bab bac bah bai bak ban bao bas bba bbb bbc bbh bbi bbk bbn bbo bbs bca bcb bcc bch bci bck bcn bco bcs bha bhb bhc bhh bhi bhk bho bhs bi- bia bib bic bih bii bik bin bio bis bka bkb bkc bkk bkn bko bks bna bnb bnc bni bnk bnn bno bns boa bob boc boh boi bok bon boo bos bsa bsb bsc bsh bsi bsk bsn bso bss c-- caa cab cac cah cai cak can cao cas cba cbb cbc cbh cbi cbk cbn cbo cbs cca ccb ccc cch cci cck ccn cco ccs ch- cha chb chc chh chi chk chn cho chs ci- cia cib cic cih cii cik cin cio cis cka ckb ckc ckh cki cko cks cn- cna cnb cnc cnh cni cnn cno cns co- coa cob coc coh coi cok con coo cos csa csb csc csh csi csk csn cso css h-i haa hab hac hah hai hak han hao has hba hbb hbc hbh hbi hbk hbn hbo hbs hca hcb hcc hch hci hck hcn hco hcs hha hhb hhc hhh hhi hhk hhn hho hhs hia hib hic hih hii hik hin hio his hka hkb hkh hki hkk hkn hko hks hna hnb hnc hnh hnk hnn hno hns hoa hob hoc hoh hoi hok hon hoo hos hsa hsb hsc hsh hsi hsk hsn hss ia- iaa iab iac iah iai ian iao ias iba ibb ibc ibh ibi ibk ibn ibo ibs ica icb icc ich ici ick icn ico ics iha ihb ihc ihh ihi ihk ihn iho ihs iia iib iic iih iii iin iio iis ika ikb ikc iki ikk iko iks in- ina inb inc inh ini ink inn ino ins io- ioa iob ioc ioh ioi ion ioo ios is- isa isb isc ish isi isk isn iso iss ka- kaa kab kac kah kai kak kan kao kas kba kbb kbc kbh kbi kbk kbn kbo kbs kca kcb kcc kch kci kck kcn kcs kha khh khi khk khn kho khs kia kib kic kih kii kik kin kio kis kkb kkc kkh kki kkk kkn kks kn- kna knc kni knk knn kno koa kob koc koh koi kok kon koo kos ksa ksb ksc ksh ksi ksk ksn kso kss n-i naa nab nac nah nai nak nan nao nas nba nbb nbc nbi nbk nbn nbo nbs nca ncb ncc nch nci nck ncn nco ncs nha nhb nhc nhh nhi nhk nhn nhs nia nib nic nih nii nik nin nio nis nka nkc nki nkk nkn nko nks nna nnb nnc nnh nni nnk nnn nno nns no- noa nob noc noh noi nok non noo nos nsa nsb nsc nsh nsi nsk nsn nso nss o-i oaa oab oac oah oai oak oan oao oas ob- oba obb obc obh obi obk obn obo obs oc- oca ocb occ och oci ock ocn oco ocs oha ohc ohh ohi ohn oho ohs oia oib oic oii oik oin oio ois oka okb okc oki okk oko oks on- ona onb onc onh oni onk onn ono ons oo- ooa oob ooc ooh ooi ook oon ooo oos os- osa osb osc osh osi osk osn oso oss saa sab sac sah sai sak san sao sas sba sbb sbc sbh sbi sbk sbn sbo sbs sca scb scc sch sci sck scn sco scs sh- sha shb shc shh shi shk shn sho shs sia sib sic sih sii sik sin sio sis sk- ska skb skc skh ski skk sko sks sna snb snc sni snk snn sno sns soa sob soc soh soi sok son soo sos ss- ssa ssb ssc ssh ssi ssk ssn sso sss