a-a a-b a-c aaa aab aac aaj aam aao ab- aba abb abc abj abm abo ac- aca acb acc acj acm aco aja ajb ajc ajj ajm ajo ama amb amc amm amo aoa aob aoc aoj aom aoo baa bab bac baj bam bao bba bbb bbc bbm bbo bca bcb bcc bcj bcm bco bja bjc bjj bjm bma bmb bmc bmj bmm bmo boa bob boc boj bom boo c-- c-j caa cab cac caj cam cao cba cbb cbc cbj cbm cbo cca ccb ccc ccj ccm cco cja cjb cjc cma cmb cmc cmj cmm cmo co- coa cob coc coj com coo jaa jab jac jaj jam jao jba jbc jbj jbm jbo jca jcb jcc jcm jco jja jjb jjc jjj jma jmb jmc jmj jmm jmo joa job joc joj jom joo m-o maa mab mac maj mam mao mba mbb mbc mbj mbm mbo mc- mca mcb mcc mcm mco mjb mjc mjj mjm mma mmb mmc mmj mmm mmo moa mob moc mom moo oaa oab oac oaj oam oao ob- oba obb obc obj obm obo oc- oca ocb occ ocj ocm oco oja ojb ojc ojm ojo om- oma omb omc omj omm omo oo- ooa oob ooc oom ooo