a-a a-b aaa aab aaj aak aam aao aas ab- aba abb abj abk abm abo abs aja ajb ajj ajk ajm ajo ajs aka akb akj akk akm ako aks ama amb amk amm amo ams aoa aob aoj aok aom aoo aos as- asa asb asj ask asm aso ass baa bab baj bak bam bao bas bba bbb bbk bbm bbo bbs bja bjj bjk bjm bjs bka bkb bkk bkm bko bks bma bmb bmj bmk bmm bmo bms boa bob boj bok bom boo bos bsa bsb bsj bsk bsm bso bss jaa jab jaj jak jam jao jas jba jbj jbk jbm jbo jbs jja jjb jjj jjk jjs jka jkb jkk jkm jko jks jma jmb jmj jmm jmo jms joa job joj jok jom joo jos jsa jsb jsj jsk jsm jso jss ka- kaa kab kaj kak kam kao kas kba kbb kbk kbm kbo kbs kjb kjs kkb kkk kkm kks kma kmb kmj kmk kmm kmo kms koa kob kok kom koo kos ksa ksb ksk ksm kso kss m-o maa mab maj mak mam mao mas mba mbb mbj mbk mbm mbo mbs mjb mjj mjk mjm mjs mka mkb mkk mkm mko mks mma mmb mmj mmk mmm mmo mms moa mob mok mom moo mos msa msb msj msk msm mso mss oaa oab oaj oak oam oao oas ob- oba obb obj obk obm obo obs oja ojb ojm ojo ojs oka okb okj okk oko oks om- oma omb omj omm omo oms oo- ooa oob ook oom ooo oos os- osa osb osj osk osm oso oss saa sab saj sak sam sao sas sba sbb sbj sbk sbm sbo sbs sja sjb sjj sjk sjm sjs sk- ska skb skj skk skm sko sks sma smb smk smm smo sms soa sob soj sok som soo sos ss- ssa ssb ssj ssk ssm sso sss