-er -ic bbb bbc bbe bbi bbm bbr bbt bcb bcc bce bci bcm bcr bct be- beb bec bee bei bem ber bet bi- bib bic bie bii bim bir bit bmb bmc bme bmi bmm bmr bmt brb bre bri brm brr brt btb btc bte bti btm btr btt c-- cbb cbc cbe cbi cbm cbr cbt ccb ccc cce cci ccm ccr cct ce- ceb cec cee cei cem cer cet ci- cib cic cie cii cim cir cit cmb cmc cme cmi cmm cmr cmt crb crc cre cri crm crr crt ctb ctc cte cti ctm ctr ctt ebb ebc ebe ebi ebm ebr ebt ec- ecb ecc ece eci ecm ecr ect eeb eec eee eem eer eet eib eic eie eii eim eir eit em- emb emc eme emi emm emr emt erb erc ere eri erm err ert etb etc ete eti etm etr ett ibb ibc ibe ibi ibm ibr ibt icb icc ice ici icm icr ict ie- iec iee iei iem ier iet iib iic iie iii iim iir iit im- imb imc ime imi imm imt ir- irb irc ire iri irm irr irt itb itc ite iti itm itt m-r mbb mbc mbe mbi mbm mbr mbt mc- mcb mcc mce mci mcm mcr mct meb mec mee mei mem mer met mi- mib mic mie mii mim mir mit mmb mmc mme mmi mmm mmr mmt mrb mrc mre mri mrm mrr mrt mtb mtc mte mti mtm mtr mtt rbb rbc rbe rbi rbm rbr rbt rcb rcc rce rci rcm rcr rct re- reb rec ree rei rem rer ret rib ric rie rii rim rir rit rmb rmc rme rmi rmm rmr rmt rrb rrc rri rrm rrr rrt rtb rtc rte rti rtm rtr rtt tbb tbc tbe tbi tbm tbr tbt tcb tcc tce tci tcm tcr tct te- teb tec tee tei tem ter tet tib tic tie tii tim tir tit tmb tmc tme tmi tmm tmr tmt trb trc tre tri trm trr trt ttb ttc tte tti ttm ttr ttt