-ic bbb bbc bbe bbi bbm bbo bbt bcb bcc bce bci bcm bco bct be- beb bec bee bei bem beo bet bi- bib bic bie bii bim bio bit bmb bmc bme bmi bmm bmo bmt bob boc boe boi bom boo bot btb btc bte bti btm bto btt c-- cbb cbc cbe cbi cbm cbo cbt ccb ccc cce cci ccm cco cct ce- ceb cec cee cei cem ceo cet ci- cib cic cie cii cim cio cit cmb cmc cme cmi cmm cmo cmt co- cob coc coe coi com coo cot ctb ctc cte cti ctm cto ctt ebb ebc ebe ebi ebm ebo ebt ec- ecb ecc ece eci ecm eco ect eeb eec eee eem eeo eet eib eic eie eii eim eio eit em- emb emc eme emi emm emo emt eo- eob eoc eoe eoi eom eoo eot etb etc ete eti etm eto ett ibb ibc ibe ibi ibm ibo ibt icb icc ice ici icm ico ict ie- iec iee iei iem iet iib iic iie iii iim iio iit im- imb imc ime imi imm imo imt io- iob ioc ioe ioi iom ioo iot itb itc ite iti itm ito itt m-o mbb mbc mbe mbi mbm mbo mbt mc- mcb mcc mce mci mcm mco mct meb mec mee mei mem meo met mi- mib mic mie mii mim mio mit mmb mmc mme mmi mmm mmo mmt mob moc moe moi mom moo mot mtb mtc mte mti mtm mto mtt o-i ob- obb obc obe obi obm obo obt oc- ocb occ oci ocm oco oct oeb oec oee oei oem oeo oet oib oic oie oii oim oio oit om- omb omc ome omi omm omo omt oo- oob ooc ooi oom ooo oot ot- otb otc ote oti otm oto ott tbb tbc tbe tbi tbm tbo tbt tcb tcc tce tci tcm tco tct te- teb tec tee tei tem teo tet tib tic tie tii tim tio tit tmb tmc tme tmi tmm tmo tmt to- tob toc toe toi tom too tot ttb ttc tte tti ttm tto ttt