a-a a-b a-c aaa aab aac aaj aak aam aao ab- aba abb abc abj abk abm abo ac- aca acb acc acj ack acm aco aja ajb ajc ajj ajk ajm ajo aka akb akc akj akk akm ako ama amb amc amk amm amo aoa aob aoc aoj aok aom aoo baa bab bac baj bak bam bao bba bbb bbc bbk bbm bbo bca bcb bcc bcj bck bcm bco bja bjc bjj bjk bjm bka bkb bkc bkk bkm bko bma bmb bmc bmj bmk bmm bmo boa bob boc boj bok bom boo c-- c-j caa cab cac caj cak cam cao cba cbb cbc cbj cbk cbm cbo cca ccb ccc ccj cck ccm cco cja cjb cjc cjk cka ckb ckc ckm cko cma cmb cmc cmj cmk cmm cmo co- coa cob coc coj cok com coo jaa jab jac jaj jak jam jao jba jbc jbj jbk jbm jbo jca jcb jcc jck jcm jco jja jjb jjc jjj jjk jka jkb jkk jkm jko jma jmb jmc jmj jmm jmo joa job joc joj jok jom joo ka- kaa kab kac kaj kak kam kao kba kbb kbc kbk kbm kbo kca kcb kcc kck kcm kjb kjc kkb kkc kkk kkm kma kmb kmc kmj kmk kmm kmo koa kob koc kok kom koo m-o maa mab mac maj mak mam mao mba mbb mbc mbj mbk mbm mbo mc- mca mcb mcc mck mcm mco mjb mjc mjj mjk mjm mka mkb mkc mkk mkm mko mma mmb mmc mmj mmk mmm mmo moa mob moc mok mom moo oaa oab oac oaj oak oam oao ob- oba obb obc obj obk obm obo oc- oca ocb occ ocj ock ocm oco oja ojb ojc ojm ojo oka okb okc okj okk oko om- oma omb omc omj omm omo oo- ooa oob ooc ook oom ooo