a-a a-b aaa aab aaj aak aam aao ab- aba abb abj abk abm abo aja ajb ajj ajk ajm ajo aka akb akj akk akm ako ama amb amk amm amo aoa aob aoj aok aom aoo baa bab baj bak bam bao bba bbb bbk bbm bbo bja bjj bjk bjm bka bkb bkk bkm bko bma bmb bmj bmk bmm bmo boa bob boj bok bom boo jaa jab jaj jak jam jao jba jbj jbk jbm jbo jja jjb jjj jjk jka jkb jkk jkm jko jma jmb jmj jmm jmo joa job joj jok jom joo ka- kaa kab kaj kak kam kao kba kbb kbk kbm kbo kjb kkb kkk kkm kma kmb kmj kmk kmm kmo koa kob kok kom koo m-o maa mab maj mak mam mao mba mbb mbj mbk mbm mbo mjb mjj mjk mjm mka mkb mkk mkm mko mma mmb mmj mmk mmm mmo moa mob mok mom moo oaa oab oaj oak oam oao ob- oba obb obj obk obm obo oja ojb ojm ojo oka okb okj okk oko om- oma omb omj omm omo oo- ooa oob ook oom ooo