-er bbb bbe bbg bbi bbr bbs bbt be- beb bee beg bei ber bes bet bez bgb bge bgg bgi bgr bgs bgt bgz bi- bib bie big bii bir bis bit biz brb bre brg bri brr brs brt brz bsb bse bsg bsi bsr bss bst btb bte btg bti btr bts btt btz bze bzr bzs bzz ebb ebe ebg ebi ebr ebs ebt eeb eee eeg eer ees eet egb ege egg egi egr egs egt eib eie eig eii eir eis eit erb ere erg eri err ers ert erz es- esb ese esg esi esr ess est etb ete etg eti etr ets ett etz eze ezr ezs ezz gbe gbg gbi gbr gbs gbt gbz ge- geb gee geg gei ger ges get gez ggb ggg ggi ggr ggs ggt ggz gib gie gig gii gir gis git giz grb gre grg gri grr grs grt gsb gse gsg gsi gsr gss gst gtb gte gtg gti gtr gts gtt gzr ibb ibe ibg ibi ibr ibs ibt ibz ie- iee ieg iei ier ies iet igb ige igg igi igr igs igt iib iie iii iir iis iit ir- irb ire irg iri irr irs irt is- isb ise isg isi isr iss ist itb ite itg iti its itt itz ize izi izz rbb rbe rbg rbi rbr rbs rbt re- reb ree reg rei rer res ret rez rgb rge rgg rgi rgr rgs rgt rib rie rig rii rir ris rit riz rrb rrg rri rrr rrs rrt rsb rse rsg rsi rsr rss rst rtb rte rtg rti rtr rts rtt rtz rzb rze sbb sbe sbg sbi sbr sbs sbt se- seb see seg sei ser ses set sez sgb sge sgg sgi sgr sgs sgt sib sie sig sii sir sis sit sr- srb sre srg sri srr srs srt ss- ssb sse ssg ssi ssr sss sst ssz stb ste stg sti str sts stt stz sze szi szr tbb tbe tbg tbi tbr tbs tbt tbz te- teb tee teg tei ter tes tet tez tgb tge tgg tgi tgr tgs tgt tgz tib tie tig tii tir tis tit tiz trb tre trg tri trr trs trt trz tsb tse tsg tsi tsr tss tst ttb tte ttg tti ttr tts ttt tze tzs z-g zbb zbr zbs zbt zeb zee zer zes zet zez zgb zgg zgi zgs zib zie zig zir zis zit ziz zrs zse zsg zsi zst zsz zte ztr zzr zzs zzt zzz