-er b-p bbb bbe bbi bbl bbp bbr bbs bbt be- beb bee bei bel bep ber bes bet bi- bib bie bii bil bip bir bis bit blb ble bli bll blp blr bls blt bpb bpe bpi bpl bpp bpr bps bpt brb bre bri brl brp brr brs brt bsb bse bsi bsl bsp bsr bss bst btb bte bti btl btp btr bts btt ebb ebe ebi ebl ebp ebr ebs ebt eeb eee eel eep eer ees eet eib eie eii eil eip eir eis eit elb ele eli ell elp elr els elt ep- epb epe epi epl epp epr eps ept erb ere eri erl erp err ers ert es- esb ese esi esl esp esr ess est etb ete eti etl etp etr ets ett ibb ibe ibi ibl ibp ibr ibs ibt ie- iee iei iel iep ier ies iet iib iie iii iil iip iir iis iit il- ilb ile ili ill ilp ilr ils ilt ipb ipe ipi ipl ipp ipr ips ipt ir- irb ire iri irl irp irr irs irt is- isb ise isi isl isp isr iss ist itb ite iti itl itp its itt l-p lbb lbe lbi lbl lbp lbr lbs lbt leb lee lei lel lep ler les let lib lie lii lil lip lir lis lit llb lle lli lll llp llr lls llt lpb lpe lpi lpl lpp lpr lps lpt lrb lri lrp lrr lrs lrt lsb lse lsi lsl lsp lsr lss lst ltb lte lti ltl ltp ltr lts ltt p-p pbb pbe pbi pbl pbp pbr pbs pbt peb pee pei pel pep per pes pet pib pie pii pil pip pir pis pit plb ple pli pll plp plr pls plt ppb ppe ppi ppl ppp ppr pps ppt prb pre pri prl prp prr prs prt ps- psb pse psi psl psp psr pss pst pt- ptb pte pti ptl ptp ptr pts ptt rbb rbe rbi rbl rbp rbr rbs rbt re- reb ree rei rel rep rer res ret rib rie rii ril rip rir ris rit rle rli rll rlp rlr rls rlt rpb rpe rpi rpl rpp rpr rps rpt rrb rri rrl rrp rrr rrs rrt rsb rse rsi rsl rsp rsr rss rst rtb rte rti rtl rtp rtr rts rtt sbb sbe sbi sbl sbp sbr sbs sbt se- seb see sei sel sep ser ses set sib sie sii sil sip sir sis sit slb sle sli sll slp slr sls slt spb spe spi spl spp spr sps spt sr- srb sre sri srl srp srr srs srt ss- ssb sse ssi ssl ssp ssr sss sst stb ste sti stl stp str sts stt tbb tbe tbi tbl tbp tbr tbs tbt te- teb tee tei tel tep ter tes tet tib tie tii til tip tir tis tit tle tli tll tlp tlr tls tlt tpb tpe tpi tpl tpp tpr tps tpt trb tre tri trl trp trr trs trt tsb tse tsi tsl tsp tsr tss tst ttb tte tti ttl ttp ttr tts ttt