-ic a-a a-b a-c a-i aaa aab aac aah aai aan aao aas ab- aba abb abc abh abi abn abo abs ac- aca acb acc ach aci acn aco acs aha ahb ahc ahh ahi ahn aho ahs ai- aia aib aic aih aii ain aio ais an- ana anb anc anh ani ann ano ans aoa aob aoc aoh aoi aon aoo aos as- asa asb asc ash asi asn aso ass baa bab bac bah bai ban bao bas bba bbb bbc bbh bbi bbn bbo bbs bca bcb bcc bch bci bcn bco bcs bha bhb bhc bhh bhi bho bhs bi- bia bib bic bih bii bin bio bis bna bnb bnc bni bnn bno bns boa bob boc boh boi bon boo bos bsa bsb bsc bsh bsi bsn bso bss c-- caa cab cac cah cai can cao cas cba cbb cbc cbh cbi cbn cbo cbs cca ccb ccc cch cci ccn cco ccs ch- cha chb chc chh chi chn cho chs ci- cia cib cic cih cii cin cio cis cn- cna cnb cnc cnh cni cnn cno cns co- coa cob coc coh coi con coo cos csa csb csc csh csi csn cso css h-i haa hab hac hah hai han hao has hba hbb hbc hbh hbi hbn hbo hbs hca hcb hcc hch hci hcn hco hcs hha hhb hhc hhh hhi hhn hho hhs hia hib hic hih hii hin hio his hna hnb hnc hnh hnn hno hns hoa hob hoc hoh hoi hon hoo hos hsa hsb hsc hsh hsi hsn hss ia- iaa iab iac iah iai ian iao ias iba ibb ibc ibh ibi ibn ibo ibs ica icb icc ich ici icn ico ics iha ihb ihc ihh ihi ihn iho ihs iia iib iic iih iii iin iio iis in- ina inb inc inh ini inn ino ins io- ioa iob ioc ioh ioi ion ioo ios is- isa isb isc ish isi isn iso iss n-i naa nab nac nah nai nan nao nas nba nbb nbc nbi nbn nbo nbs nca ncb ncc nch nci ncn nco ncs nha nhb nhc nhh nhi nhn nhs nia nib nic nih nii nin nio nis nna nnb nnc nnh nni nnn nno nns no- noa nob noc noh noi non noo nos nsa nsb nsc nsh nsi nsn nso nss o-i oaa oab oac oah oai oan oao oas ob- oba obb obc obh obi obn obo obs oc- oca ocb occ och oci ocn oco ocs oha ohc ohh ohi ohn oho ohs oia oib oic oii oin oio ois on- ona onb onc onh oni onn ono ons oo- ooa oob ooc ooh ooi oon ooo oos os- osa osb osc osh osi osn oso oss saa sab sac sah sai san sao sas sba sbb sbc sbh sbi sbn sbo sbs sca scb scc sch sci scn sco scs sh- sha shb shc shh shi shn sho shs sia sib sic sih sii sin sio sis sna snb snc sni snn sno sns soa sob soc soh soi son soo sos ss- ssa ssb ssc ssh ssi ssn sso sss