-ic a-a a-b a-c a-i aaa aab aac aad aah aai aao aas ab- aba abb abc abd abh abi abo abs ac- aca acb acc acd ach aci aco acs ad- ada adb adc add adh adi ado ads aha ahb ahc ahd ahh ahi aho ahs ai- aia aib aic aid aih aii aio ais aoa aob aoc aod aoh aoi aoo aos as- asa asb asc asd ash asi aso ass baa bab bac bad bah bai bao bas bba bbb bbc bbd bbh bbi bbo bbs bca bcb bcc bcd bch bci bco bcs bda bdb bdc bdd bdh bdi bdo bds bha bhb bhc bhd bhh bhi bho bhs bi- bia bib bic bid bih bii bio bis boa bob boc bod boh boi boo bos bsa bsb bsc bsd bsh bsi bso bss c-- caa cab cac cad cah cai cao cas cba cbb cbc cbd cbh cbi cbo cbs cca ccb ccc ccd cch cci cco ccs cda cdb cdc cdd cdh cdi cdo cds ch- cha chb chc chd chh chi cho chs ci- cia cib cic cid cih cii cio cis co- coa cob coc cod coh coi coo cos csa csb csc csd csh csi cso css daa dab dac dad dah dai dao das dba dbb dbc dbd dbh dbi dbo dbs dca dcb dcc dcd dci dco dcs dda ddb ddc ddd ddh ddi ddo dds dh- dha dhb dhc dhd dhh dhi dho dhs di- dia dib dic did dih dii dio dis doa dob doc dod doh doi doo dos dsa dsb dsc dsd dsh dsi dso dss h-i haa hab hac had hah hai hao has hba hbb hbc hbd hbh hbi hbo hbs hca hcb hcc hcd hch hci hco hcs hda hdb hdc hdd hdh hdi hdo hds hha hhb hhc hhd hhh hhi hho hhs hia hib hic hid hih hii hio his hoa hob hoc hod hoh hoi hoo hos hsa hsb hsc hsd hsh hsi hss i-d ia- iaa iab iac iad iah iai iao ias iba ibb ibc ibd ibh ibi ibo ibs ica icb icc icd ich ici ico ics ida idb idc idd idh idi ido ids iha ihb ihc ihd ihh ihi iho ihs iia iib iic iid iih iii iio iis io- ioa iob ioc iod ioh ioi ioo ios is- isa isb isc isd ish isi iso iss o-i oaa oab oac oad oah oai oao oas ob- oba obb obc obd obh obi obo obs oc- oca ocb occ ocd och oci oco ocs oda odb odc odd odh odi odo ods oha ohc ohd ohh ohi oho ohs oia oib oic oid oii oio ois oo- ooa oob ooc ood ooh ooi ooo oos os- osa osb osc osd osh osi oso oss saa sab sac sad sah sai sao sas sba sbb sbc sbd sbh sbi sbo sbs sca scb scc scd sch sci sco scs sda sdb sdc sdd sdh sdi sdo sds sh- sha shb shc shd shh shi sho shs sia sib sic sid sih sii sio sis soa sob soc sod soh soi soo sos ss- ssa ssb ssc ssd ssh ssi sso sss