-ic a-a a-b a-c a-i aaa aab aac aag aah aai aao aas ab- aba abb abc abg abh abi abo abs ac- aca acb acc acg ach aci aco acs ag- aga agb agc agg agh agi ago ags aha ahb ahc ahg ahh ahi aho ahs ai- aia aib aic aig aih aii aio ais aoa aob aoc aog aoh aoi aoo aos as- asa asb asc asg ash asi aso ass baa bab bac bag bah bai bao bas bba bbb bbc bbg bbh bbi bbo bbs bca bcb bcc bcg bch bci bco bcs bga bgb bgc bgg bgh bgi bgo bgs bha bhb bhc bhg bhh bhi bho bhs bi- bia bib bic big bih bii bio bis boa bob boc bog boh boi boo bos bsa bsb bsc bsg bsh bsi bso bss c-- caa cab cac cag cah cai cao cas cba cbb cbc cbg cbh cbi cbo cbs cca ccb ccc ccg cch cci cco ccs cga cgb cgc cgg cgh cgi cgo cgs ch- cha chb chc chg chh chi cho chs ci- cia cib cic cig cih cii cio cis co- coa cob coc cog coh coi coo cos csa csb csc csg csh csi cso css gaa gab gac gag gah gai gao gas gba gbc gbg gbh gbi gbo gbs gca gcb gcc gcg gch gci gco gcs gga ggb ggc ggg ggh ggi ggo ggs gha ghb ghc ghg ghh ghi gho ghs gia gib gic gig gih gii gio gis goa gob goc gog goh goi goo gos gsa gsb gsc gsg gsi gso gss h-i haa hab hac hag hah hai hao has hba hbb hbc hbg hbh hbi hbo hbs hca hcb hcc hcg hch hci hco hcs hga hgb hgc hgg hgh hgi hgo hgs hha hhb hhc hhg hhh hhi hho hhs hia hib hic hig hih hii hio his hoa hob hoc hog hoh hoi hoo hos hsa hsb hsc hsg hsh hsi hss ia- iaa iab iac iag iah iai iao ias iba ibb ibc ibg ibh ibi ibo ibs ica icb icc icg ich ici ico ics iga igb igc igg igh igi igo igs iha ihb ihc ihg ihh ihi iho ihs iia iib iic iih iii iio iis io- ioa iob ioc iog ioh ioi ioo ios is- isa isb isc isg ish isi iso iss o-i oaa oab oac oag oah oai oao oas ob- oba obb obc obg obh obi obo obs oc- oca ocb occ ocg och oci oco ocs oga ogc ogg ogh ogi ogo ogs oha ohc ohg ohh ohi oho ohs oia oib oic oii oio ois oo- ooa oob ooc oog ooh ooi ooo oos os- osa osb osc osg osh osi oso oss saa sab sac sag sah sai sao sas sba sbb sbc sbg sbh sbi sbo sbs sca scb scc scg sch sci sco scs sga sgb sgc sgg sgh sgi sgo sgs sh- sha shb shc shg shh shi sho shs sia sib sic sig sih sii sio sis soa sob soc sog soh soi soo sos ss- ssa ssb ssc ssg ssh ssi sso sss