-er -ic bbb bbc bbe bbi bbm bbo bbr bbt bcb bcc bce bci bcm bco bcr bct be- beb bec bee bei bem beo ber bet bi- bib bic bie bii bim bio bir bit bmb bmc bme bmi bmm bmo bmr bmt bob boc boe boi bom boo bor bot brb bre bri brm bro brr brt btb btc bte bti btm bto btr btt c-- cbb cbc cbe cbi cbm cbo cbr cbt ccb ccc cce cci ccm cco ccr cct ce- ceb cec cee cei cem ceo cer cet ci- cib cic cie cii cim cio cir cit cmb cmc cme cmi cmm cmo cmr cmt co- cob coc coe coi com coo cor cot crb crc cre cri crm cro crr crt ctb ctc cte cti ctm cto ctr ctt ebb ebc ebe ebi ebm ebo ebr ebt ec- ecb ecc ece eci ecm eco ecr ect eeb eec eee eem eeo eer eet eib eic eie eii eim eio eir eit em- emb emc eme emi emm emo emr emt eo- eob eoc eoe eoi eom eoo eor eot erb erc ere eri erm ero err ert etb etc ete eti etm eto etr ett ibb ibc ibe ibi ibm ibo ibr ibt icb icc ice ici icm ico icr ict ie- iec iee iei iem ier iet iib iic iie iii iim iio iir iit im- imb imc ime imi imm imo imt io- iob ioc ioe ioi iom ioo ior iot ir- irb irc ire iri irm iro irr irt itb itc ite iti itm ito itt m-o m-r mbb mbc mbe mbi mbm mbo mbr mbt mc- mcb mcc mce mci mcm mco mcr mct meb mec mee mei mem meo mer met mi- mib mic mie mii mim mio mir mit mmb mmc mme mmi mmm mmo mmr mmt mob moc moe moi mom moo mor mot mrb mrc mre mri mrm mro mrr mrt mtb mtc mte mti mtm mto mtr mtt o-i ob- obb obc obe obi obm obo obr obt oc- ocb occ oci ocm oco ocr oct oeb oec oee oei oem oeo oer oet oib oic oie oii oim oio oir oit om- omb omc ome omi omm omo omr omt oo- oob ooc ooi oom ooo oor oot or- orb orc ore ori orm oro orr ort ot- otb otc ote oti otm oto otr ott rbb rbc rbe rbi rbm rbo rbr rbt rcb rcc rce rci rcm rco rcr rct re- reb rec ree rei rem reo rer ret rib ric rie rii rim rio rir rit rmb rmc rme rmi rmm rmo rmr rmt rob roc roe roi rom roo ror rot rrb rrc rri rrm rrr rrt rtb rtc rte rti rtm rto rtr rtt tbb tbc tbe tbi tbm tbo tbr tbt tcb tcc tce tci tcm tco tcr tct te- teb tec tee tei tem teo ter tet tib tic tie tii tim tio tir tit tmb tmc tme tmi tmm tmo tmr tmt to- tob toc toe toi tom too tor tot trb trc tre tri trm tro trr trt ttb ttc tte tti ttm tto ttr ttt