bbb bbi bbk bbm bbo bbx bi- bib bii bik bim bio bix bkb bkk bkm bko bkx bmb bmi bmk bmm bmo bmx bob boi bok bom boo box bxb bxi bxm bxo bxx ibb ibi ibk ibm ibo ibx iib iii iim iio iix ikb iki ikk iko ikx im- imb imi imm imo imx io- iob ioi iom ioo ixi kbb kbi kbk kbm kbo kbx kib kii kik kim kio kix kkb kki kkk kkm kmb kmi kmk kmm kmo kob koi kok kom koo kxm kxo m-o mbb mbi mbk mbm mbo mbx mi- mib mii mik mim mio mix mkb mkk mkm mko mkx mmb mmi mmk mmm mmo mmx mob moi mok mom moo mox mxi o-i ob- obb obi obk obm obo obx oib oii oik oim oio okb oki okk oko om- omb omi omm omo omx oo- oob ooi ook oom ooo oox ox- oxb oxi oxo oxx xbx xii xio xix xkb xmi xmk xmm xmo xmx xoi xok xom xoo xox xxi xxo xxx