-er bbb bbe bbi bbl bbm bbr bbs bbt be- beb bee bei bel bem ber bes bet bi- bib bie bii bil bim bir bis bit blb ble bli bll blm blr bls blt bmb bme bmi bml bmm bmr bms bmt brb bre bri brl brm brr brs brt bsb bse bsi bsl bsm bsr bss bst btb bte bti btl btm btr bts btt ebb ebe ebi ebl ebm ebr ebs ebt eeb eee eel eem eer ees eet eib eie eii eil eim eir eis eit elb ele eli ell elm elr els elt em- emb eme emi eml emm emr ems emt erb ere eri erl erm err ers ert es- esb ese esi esl esm esr ess est etb ete eti etl etm etr ets ett ibb ibe ibi ibl ibm ibr ibs ibt ie- iee iei iel iem ier ies iet iib iie iii iil iim iir iis iit il- ilb ile ili ill ilm ilr ils ilt im- imb ime imi iml imm ims imt ir- irb ire iri irl irm irr irs irt is- isb ise isi isl ism isr iss ist itb ite iti itl itm its itt lbb lbe lbi lbl lbm lbr lbs lbt leb lee lei lel lem ler les let lib lie lii lil lim lir lis lit llb lle lli lll llm llr lls llt lmb lme lmi lml lmm lmr lms lmt lrb lri lrm lrr lrs lrt lsb lse lsi lsl lsm lsr lss lst ltb lte lti ltl ltm ltr lts ltt m-r mbb mbe mbi mbl mbm mbr mbs mbt meb mee mei mel mem mer mes met mi- mib mie mii mil mim mir mis mit mlb mle mli mll mlm mlr mls mlt mmb mme mmi mml mmm mmr mms mmt mrb mre mri mrl mrm mrr mrs mrt msb mse msi msl msm msr mss mst mtb mte mti mtl mtm mtr mts mtt rbb rbe rbi rbl rbm rbr rbs rbt re- reb ree rei rel rem rer res ret rib rie rii ril rim rir ris rit rle rli rll rlm rlr rls rlt rmb rme rmi rml rmm rmr rms rmt rrb rri rrl rrm rrr rrs rrt rsb rse rsi rsl rsm rsr rss rst rtb rte rti rtl rtm rtr rts rtt sbb sbe sbi sbl sbm sbr sbs sbt se- seb see sei sel sem ser ses set sib sie sii sil sim sir sis sit slb sle sli sll slm slr sls slt smb sme smi sml smm smr sms smt sr- srb sre sri srl srm srr srs srt ss- ssb sse ssi ssl ssm ssr sss sst stb ste sti stl stm str sts stt tbb tbe tbi tbl tbm tbr tbs tbt te- teb tee tei tel tem ter tes tet tib tie tii til tim tir tis tit tle tli tll tlm tlr tls tlt tmb tme tmi tml tmm tmr tms tmt trb tre tri trl trm trr trs trt tsb tse tsi tsl tsm tsr tss tst ttb tte tti ttl ttm ttr tts ttt