a-a a-b aaa aab aae aag aah aao aas ab- aba abb abe abg abh abo abs aea aeb aee aeg aeh aeo aes ag- aga agb age agg agh ago ags aha ahb ahe ahg ahh aho ahs aoa aob aoe aog aoh aoo aos as- asa asb ase asg ash aso ass baa bab bae bag bah bao bas bba bbb bbe bbg bbh bbo bbs be- bea beb bee beg beh beo bes bga bgb bge bgg bgh bgo bgs bha bhb bhe bhg bhh bho bhs boa bob boe bog boh boo bos bsa bsb bse bsg bsh bso bss eaa eab eae eag eah eao eas eba ebb ebe ebg ebh ebo ebs eea eeb eee eeg eeo ees ega egb ege egg egh ego egs eha ehb ehe ehg ehh eho ehs eo- eoa eob eoe eog eoh eoo eos es- esa esb ese esg esh eso ess gaa gab gae gag gah gao gas gba gbe gbg gbh gbo gbs ge- gea geb gee geg geh geo ges gga ggb ggg ggh ggo ggs gha ghb ghe ghg ghh gho ghs goa gob goe gog goh goo gos gsa gsb gse gsg gso gss haa hab hae hag hah hao has hba hbb hbe hbg hbh hbo hbs he- hea heb hee heg heh heo hes hga hgb hge hgg hgh hgo hgs hha hhb hhe hhg hhh hho hhs hoa hob hoe hog hoh hoo hos hsa hsb hse hsg hsh hss oaa oab oae oag oah oao oas ob- oba obb obe obg obh obo obs oea oeb oee oeg oeh oeo oes oga oge ogg ogh ogo ogs oha ohe ohg ohh oho ohs oo- ooa oob oog ooh ooo oos os- osa osb ose osg osh oso oss saa sab sae sag sah sao sas sba sbb sbe sbg sbh sbo sbs se- sea seb see seg seh seo ses sga sgb sge sgg sgh sgo sgs sh- sha shb she shg shh sho shs soa sob soe sog soh soo sos ss- ssa ssb sse ssg ssh sso sss