-er bbb bbe bbl bbn bbr bbs bbt be- beb bee bel ben ber bes bet blb ble bll bln blr bls blt bnb bne bnl bnn bnr bns bnt brb bre brl brn brr brs brt bsb bse bsl bsn bsr bss bst btb bte btl btn btr bts btt ebb ebe ebl ebn ebr ebs ebt eeb eee eel een eer ees eet elb ele ell eln elr els elt en- enb ene enl enn enr ens ent erb ere erl ern err ers ert es- esb ese esl esn esr ess est etb ete etl etn etr ets ett lbb lbe lbl lbr lbs lbt leb lee lel len ler les let llb lle lll lln llr lls llt lnb lne lnl lnn lnr lns lnt lrb lrn lrr lrs lrt lsb lse lsl lsn lsr lss lst ltb lte ltl ltr lts ltt nbb nbe nbl nbn nbr nbs nbt ne- neb nee nel nen ner nes net nlb nle nll nln nlr nls nlt nnb nne nnl nnn nns nnt nrb nre nrl nrn nrr nrs nrt nsb nse nsl nsn nsr nss nst ntb nte ntn ntr nts ntt rbb rbe rbl rbn rbr rbs rbt re- reb ree rel ren rer res ret rle rll rln rlr rls rlt rnb rnn rnr rns rnt rrb rrl rrn rrr rrs rrt rsb rse rsl rsn rsr rss rst rtb rte rtl rtn rtr rts rtt sbb sbe sbl sbn sbr sbs sbt se- seb see sel sen ser ses set slb sle sll sln slr sls slt snb sne snl snn snr sns snt sr- srb sre srl srn srr srs srt ss- ssb sse ssl ssn ssr sss sst stb ste stl stn str sts stt tbb tbe tbl tbn tbr tbs tbt te- teb tee tel ten ter tes tet tle tll tln tlr tls tlt tnb tne tnl tnn tnr tns tnt trb tre trl trn trr trs trt tsb tse tsl tsn tsr tss tst ttb tte ttl ttn ttr tts ttt