bbb bbi bbm bbo bbs bbt bbx bi- bib bii bim bio bis bit bix bmb bmi bmm bmo bms bmt bmx bob boi bom boo bos bot box bsb bsi bsm bso bss bst bsx btb bti btm bto bts btt btx bxb bxi bxm bxo bxx ibb ibi ibm ibo ibs ibt ibx iib iii iim iio iis iit iix im- imb imi imm imo ims imt imx io- iob ioi iom ioo ios iot is- isb isi ism iso iss ist itb iti itm ito its itt itx ixi m-o mbb mbi mbm mbo mbs mbt mbx mi- mib mii mim mio mis mit mix mmb mmi mmm mmo mms mmt mmx mob moi mom moo mos mot mox msb msi msm mso mss mst msx mtb mti mtm mto mts mtt mtx mxi mxs o-i ob- obb obi obm obo obs obt obx oib oii oim oio ois oit om- omb omi omm omo oms omt omx oo- oob ooi oom ooo oos oot oox os- osb osi osm oso oss ost osx ot- otb oti otm oto ots ott ox- oxb oxi oxo oxt oxx sbb sbi sbm sbo sbs sbt sbx sib sii sim sio sis sit six smb smi smm smo sms smt smx sob soi som soo sos sot sox ss- ssb ssi ssm sso sss sst ssx stb sti stm sto sts stt stx sxi sxm sxs sxt t-x tbb tbi tbm tbo tbs tbt tib tii tim tio tis tit tix tmb tmi tmm tmo tms tmt tmx to- tob toi tom too tos tot tox tsb tsi tsm tso tss tst tsx ttb tti ttm tto tts ttt ttx txi txs txt xbx xii xio xis xit xix xmi xmm xmo xms xmt xmx xoi xom xoo xos xot xox xsb xsi xsm xss xst xti xtm xts xtx xxi xxo xxx