bbb bbe bbi bbm bbo bbt bbx be- beb bee bei bem beo bet bex bi- bib bie bii bim bio bit bix bmb bme bmi bmm bmo bmt bmx bob boe boi bom boo bot box btb bte bti btm bto btt btx bxb bxi bxm bxo bxx ebb ebe ebi ebm ebo ebt ebx eeb eee eem eeo eet eex eib eie eii eim eio eit eix em- emb eme emi emm emo emt emx eo- eob eoe eoi eom eoo eot etb ete eti etm eto ett etx ex- exe exi exo ext exx ibb ibe ibi ibm ibo ibt ibx ie- iee iei iem iet iex iib iie iii iim iio iit iix im- imb ime imi imm imo imt imx io- iob ioe ioi iom ioo iot itb ite iti itm ito itt itx ixe ixi m-o mbb mbe mbi mbm mbo mbt mbx meb mee mei mem meo met mex mi- mib mie mii mim mio mit mix mmb mme mmi mmm mmo mmt mmx mob moe moi mom moo mot mox mtb mte mti mtm mto mtt mtx mxi o-i ob- obb obe obi obm obo obt obx oeb oee oei oem oeo oet oex oib oie oii oim oio oit om- omb ome omi omm omo omt omx oo- oob ooi oom ooo oot oox ot- otb ote oti otm oto ott ox- oxb oxi oxo oxt oxx t-x tbb tbe tbi tbm tbo tbt te- teb tee tei tem teo tet tex tib tie tii tim tio tit tix tmb tme tmi tmm tmo tmt tmx to- tob toe toi tom too tot tox ttb tte tti ttm tto ttt ttx txe txi txt xbe xbx xee xem xet xex xie xii xio xit xix xmi xmm xmo xmt xmx xoi xom xoo xot xox xti xtm xtx xxi xxo xxx