-er -ic bbb bbc bbe bbi bbl bbm bbr bbt bcb bcc bce bci bcl bcm bcr bct be- beb bec bee bei bel bem ber bet bi- bib bic bie bii bil bim bir bit blb blc ble bli bll blm blr blt bmb bmc bme bmi bml bmm bmr bmt brb bre bri brl brm brr brt btb btc bte bti btl btm btr btt c-- cbb cbc cbe cbi cbl cbm cbr cbt ccb ccc cce cci ccl ccm ccr cct ce- ceb cec cee cei cel cem cer cet ci- cib cic cie cii cil cim cir cit cl- clb clc cle cli cll clm clr clt cmb cmc cme cmi cml cmm cmr cmt crb crc cre cri crl crm crr crt ctb ctc cte cti ctl ctm ctr ctt ebb ebc ebe ebi ebl ebm ebr ebt ec- ecb ecc ece eci ecl ecm ecr ect eeb eec eee eel eem eer eet eib eic eie eii eil eim eir eit elb elc ele eli ell elm elr elt em- emb emc eme emi eml emm emr emt erb erc ere eri erl erm err ert etb etc ete eti etl etm etr ett ibb ibc ibe ibi ibl ibm ibr ibt icb icc ice ici icl icm icr ict ie- iec iee iei iel iem ier iet iib iic iie iii iil iim iir iit il- ilb ilc ile ili ill ilm ilr ilt im- imb imc ime imi iml imm imt ir- irb irc ire iri irl irm irr irt itb itc ite iti itl itm itt lbb lbc lbe lbi lbl lbm lbr lbt lcb lcc lce lci lcl lcm lcr lct leb lec lee lei lel lem ler let lib lic lie lii lil lim lir lit llb llc lle lli lll llm llr llt lmb lmc lme lmi lml lmm lmr lmt lrb lrc lri lrm lrr lrt ltb ltc lte lti ltl ltm ltr ltt m-r mbb mbc mbe mbi mbl mbm mbr mbt mc- mcb mcc mce mci mcl mcm mcr mct meb mec mee mei mel mem mer met mi- mib mic mie mii mil mim mir mit mlb mlc mle mli mll mlm mlr mlt mmb mmc mme mmi mml mmm mmr mmt mrb mrc mre mri mrl mrm mrr mrt mtb mtc mte mti mtl mtm mtr mtt rbb rbc rbe rbi rbl rbm rbr rbt rcb rcc rce rci rcl rcm rcr rct re- reb rec ree rei rel rem rer ret rib ric rie rii ril rim rir rit rlc rle rli rll rlm rlr rlt rmb rmc rme rmi rml rmm rmr rmt rrb rrc rri rrl rrm rrr rrt rtb rtc rte rti rtl rtm rtr rtt tbb tbc tbe tbi tbl tbm tbr tbt tcb tcc tce tci tcl tcm tcr tct te- teb tec tee tei tel tem ter tet tib tic tie tii til tim tir tit tlc tle tli tll tlm tlr tlt tmb tmc tme tmi tml tmm tmr tmt trb trc tre tri trl trm trr trt ttb ttc tte tti ttl ttm ttr ttt