-er bbb bbd bbe bbi bbk bbr bbs bbt bdb bdd bde bdi bdk bdr bds bdt be- beb bed bee bei bek ber bes bet bi- bib bid bie bii bik bir bis bit bkb bke bkk bkr bks bkt brb brd bre bri brk brr brs brt bsb bsd bse bsi bsk bsr bss bst btb btd bte bti btk btr bts btt dbb dbd dbe dbi dbk dbr dbs dbt ddb ddd dde ddi ddk ddr dds ddt de- deb ded dee dei dek der des det di- dib did die dii dik dir dis dit dkb dke dki dkk dkr dks dkt drb drd dre dri drk drr drs drt dsb dsd dse dsi dsk dsr dss dst dtb dtd dte dti dtk dtr dts dtt ebb ebd ebe ebi ebk ebr ebs ebt ed- edb edd ede edi edk edr eds edt eeb eed eee eek eer ees eet eib eid eie eii eik eir eis eit ekb ekd eke eki ekr eks ekt erb erd ere eri erk err ers ert es- esb esd ese esi esk esr ess est etb etd ete eti etk etr ets ett i-d ibb ibd ibe ibi ibk ibr ibs ibt idb idd ide idi idk idr ids idt ie- ied iee iei iek ier ies iet iib iid iie iii iir iis iit ikb ike iki ikk ikr iks ikt ir- irb ird ire iri irk irr irs irt is- isb isd ise isi isk isr iss ist itb itd ite iti itk its itt k-t kbb kbd kbe kbi kbk kbr kbs kdb kde kdk kdr kds kdt ke- keb ked kee kei kek ker kes ket kib kid kie kii kik kir kis kit kkb kke kki kkk kkr kks kkt krd kri krk krr krs krt ksb ksd kse ksi ksk ksr kss kst ktb kte ktk ktr kts ktt rbb rbd rbe rbi rbk rbr rbs rbt rdb rdd rde rdi rdr rds rdt re- reb red ree rei rek rer res ret rib rid rie rii rik rir ris rit rkb rke rkk rks rkt rrb rrd rri rrk rrr rrs rrt rsb rsd rse rsi rsk rsr rss rst rtb rtd rte rti rtk rtr rts rtt sbb sbd sbe sbi sbk sbr sbs sbt sdb sdd sde sdi sdk sdr sds sdt se- seb sed see sei sek ser ses set sib sid sie sii sik sir sis sit sk- skb skd ske ski skk skr sks skt sr- srb srd sre sri srk srr srs srt ss- ssb ssd sse ssi ssk ssr sss sst stb std ste sti stk str sts stt tbb tbd tbe tbi tbk tbr tbs tbt tdb tdd tde tdi tdk tdr tds tdt te- teb ted tee tei tek ter tes tet tib tid tie tii tik tir tis tit tkb tke tkk tkr tks tkt trb trd tre tri trk trr trs trt tsb tsd tse tsi tsk tsr tss tst ttb ttd tte tti ttk ttr tts ttt