bbb bbe bbi bbm bbo bbx be- beb bee bei bem beo bex bi- bib bie bii bim bio bix bmb bme bmi bmm bmo bmx bob boe boi bom boo box bxb bxi bxm bxo bxx ebb ebe ebi ebm ebo ebx eeb eee eem eeo eex eib eie eii eim eio eix em- emb eme emi emm emo emx eo- eob eoe eoi eom eoo ex- exe exi exo exx ibb ibe ibi ibm ibo ibx ie- iee iei iem iex iib iie iii iim iio iix im- imb ime imi imm imo imx io- iob ioe ioi iom ioo ixe ixi m-o mbb mbe mbi mbm mbo mbx meb mee mei mem meo mex mi- mib mie mii mim mio mix mmb mme mmi mmm mmo mmx mob moe moi mom moo mox mxi o-i ob- obb obe obi obm obo obx oeb oee oei oem oeo oex oib oie oii oim oio om- omb ome omi omm omo omx oo- oob ooi oom ooo oox ox- oxb oxi oxo oxx xbe xbx xee xem xex xie xii xio xix xmi xmm xmo xmx xoi xom xoo xox xxi xxo xxx