-er bbb bbe bbf bbi bbo bbr bbs bbt be- beb bee bef bei beo ber bes bet bfb bfe bff bfi bfo bfr bfs bft bi- bib bie bif bii bio bir bis bit bob boe bof boi boo bor bos bot brb bre brf bri bro brr brs brt bsb bse bsf bsi bso bsr bss bst btb bte btf bti bto btr bts btt ebb ebe ebf ebi ebo ebr ebs ebt eeb eee eef eeo eer ees eet ef- efb efe eff efi efo efr efs eft eib eie eif eii eio eir eis eit eo- eob eoe eof eoi eoo eor eos eot erb ere erf eri ero err ers ert es- esb ese esf esi eso esr ess est etb ete etf eti eto etr ets ett fbb fbe fbf fbi fbo fbr fbs fbt feb fee fef fei feo fer fes fet ffe fff ffi ffo ffr ffs fft fib fie fif fii fir fis fit fob foe fof foi foo for fos fot frb fre frf fri fro frr frs frt fsb fse fsf fsi fso fsr fss fst ftb fte ftf fti fto ftr fts ftt i-f ibb ibe ibf ibi ibo ibr ibs ibt ie- iee ief iei ier ies iet ifb ife iff ifi ifo ifr ifs ift iib iie iif iii iio iir iis iit io- iob ioe iof ioi ioo ior ios iot ir- irb ire irf iri iro irr irs irt is- isb ise isf isi iso isr iss ist itb ite itf iti ito its itt o-i ob- obb obe obf obi obo obr obs obt oeb oee oef oei oeo oer oes oet of- ofb ofe off ofi ofo ofr ofs oft oib oie oif oii oio oir ois oit oo- oob oof ooi ooo oor oos oot or- orb ore orf ori oro orr ors ort os- osb ose osf osi oso osr oss ost ot- otb ote otf oti oto otr ots ott rbb rbe rbf rbi rbo rbr rbs rbt re- reb ree ref rei reo rer res ret rfb rfe rff rfi rfo rfr rfs rft rib rie rif rii rio rir ris rit rob roe rof roi roo ror ros rot rrb rrf rri rrr rrs rrt rsb rse rsf rsi rso rsr rss rst rtb rte rtf rti rto rtr rts rtt sbb sbe sbf sbi sbo sbr sbs sbt se- seb see sef sei seo ser ses set sfb sfe sff sfi sfo sfr sfs sft sib sie sif sii sio sir sis sit sob soe sof soi soo sor sos sot sr- srb sre srf sri sro srr srs srt ss- ssb sse ssf ssi sso ssr sss sst stb ste stf sti sto str sts stt tbb tbe tbf tbi tbo tbr tbs tbt te- teb tee tef tei teo ter tes tet tfb tfe tff tfi tfo tfr tfs tft tib tie tif tii tio tir tis tit to- tob toe tof toi too tor tos tot trb tre trf tri tro trr trs trt tsb tse tsf tsi tso tsr tss tst ttb tte ttf tti tto ttr tts ttt