a-a a-b aaa aab aae aaj aak aam aao aas ab- aba abb abe abj abk abm abo abs aea aeb aee aej aek aem aeo aes aja ajb aje ajj ajk ajm ajo ajs aka akb ake akj akk akm ako aks ama amb ame amk amm amo ams aoa aob aoe aoj aok aom aoo aos as- asa asb ase asj ask asm aso ass baa bab bae baj bak bam bao bas bba bbb bbe bbk bbm bbo bbs be- bea beb bee bek bem beo bes bja bjj bjk bjm bjs bka bkb bke bkk bkm bko bks bma bmb bme bmj bmk bmm bmo bms boa bob boe boj bok bom boo bos bsa bsb bse bsj bsk bsm bso bss eaa eab eae eaj eak eam eao eas eba ebb ebe ebj ebk ebm ebo ebs eea eeb eee eek eem eeo ees eja ejo eka ekb eke eko eks em- ema emb eme emk emm emo ems eo- eoa eob eoe eok eom eoo eos es- esa esb ese esk esm eso ess jaa jab jae jaj jak jam jao jas jba jbj jbk jbm jbo jbs jea jeb jee jej jek jem jeo jes jja jjb jjj jjk jjs jka jkb jkk jkm jko jks jma jmb jme jmj jmm jmo jms joa job joe joj jok jom joo jos jsa jsb jse jsj jsk jsm jso jss ka- kaa kab kae kaj kak kam kao kas kba kbb kbe kbk kbm kbo kbs ke- kea keb kee kek kem keo kes kjb kje kjs kkb kke kkk kkm kks kma kmb kme kmj kmk kmm kmo kms koa kob koe kok kom koo kos ksa ksb kse ksk ksm kso kss m-o maa mab mae maj mak mam mao mas mba mbb mbe mbj mbk mbm mbo mbs mea meb mee mej mek mem meo mes mjb mje mjj mjk mjm mjs mka mkb mke mkk mkm mko mks mma mmb mme mmj mmk mmm mmo mms moa mob moe mok mom moo mos msa msb mse msj msk msm mso mss oaa oab oae oaj oak oam oao oas ob- oba obb obe obj obk obm obo obs oea oeb oee oem oeo oes oja ojb oje ojm ojo ojs oka okb oke okj okk oko oks om- oma omb ome omj omm omo oms oo- ooa oob ook oom ooo oos os- osa osb ose osj osk osm oso oss saa sab sae saj sak sam sao sas sba sbb sbe sbj sbk sbm sbo sbs se- sea seb see sej sek sem seo ses sja sjb sje sjj sjk sjm sjs sk- ska skb ske skj skk skm sko sks sma smb sme smk smm smo sms soa sob soe soj sok som soo sos ss- ssa ssb sse ssj ssk ssm sso sss