-er b-p bbb bbe bbg bbi bbp bbr bbs bbt be- beb bee beg bei bep ber bes bet bgb bge bgg bgi bgp bgr bgs bgt bi- bib bie big bii bip bir bis bit bpb bpe bpg bpi bpp bpr bps bpt brb bre brg bri brp brr brs brt bsb bse bsg bsi bsp bsr bss bst btb bte btg bti btp btr bts btt ebb ebe ebg ebi ebp ebr ebs ebt eeb eee eeg eep eer ees eet egb ege egg egi egp egr egs egt eib eie eig eii eip eir eis eit ep- epb epe epg epi epp epr eps ept erb ere erg eri erp err ers ert es- esb ese esg esi esp esr ess est etb ete etg eti etp etr ets ett g-p gbe gbg gbi gbp gbr gbs gbt ge- geb gee geg gei gep ger ges get ggb ggg ggi ggp ggr ggs ggt gib gie gig gii gip gir gis git gpb gpe gpg gpi gpp gpr gps gpt grb gre grg gri grp grr grs grt gsb gse gsg gsi gsp gsr gss gst gtb gte gtg gti gtp gtr gts gtt ibb ibe ibg ibi ibp ibr ibs ibt ie- iee ieg iei iep ier ies iet igb ige igg igi igp igr igs igt iib iie iii iip iir iis iit ipb ipe ipg ipi ipp ipr ips ipt ir- irb ire irg iri irp irr irs irt is- isb ise isg isi isp isr iss ist itb ite itg iti itp its itt p-p pbb pbe pbg pbi pbp pbr pbs pbt peb pee peg pei pep per pes pet pgb pge pgg pgi pgp pgr pgs pgt pib pie pig pii pip pir pis pit ppb ppe ppg ppi ppp ppr pps ppt prb pre prg pri prp prr prs prt ps- psb pse psg psi psp psr pss pst pt- ptb pte ptg pti ptp ptr pts ptt rbb rbe rbg rbi rbp rbr rbs rbt re- reb ree reg rei rep rer res ret rgb rge rgg rgi rgp rgr rgs rgt rib rie rig rii rip rir ris rit rpb rpe rpg rpi rpp rpr rps rpt rrb rrg rri rrp rrr rrs rrt rsb rse rsg rsi rsp rsr rss rst rtb rte rtg rti rtp rtr rts rtt sbb sbe sbg sbi sbp sbr sbs sbt se- seb see seg sei sep ser ses set sgb sge sgg sgi sgp sgr sgs sgt sib sie sig sii sip sir sis sit spb spe spg spi spp spr sps spt sr- srb sre srg sri srp srr srs srt ss- ssb sse ssg ssi ssp ssr sss sst stb ste stg sti stp str sts stt tbb tbe tbg tbi tbp tbr tbs tbt te- teb tee teg tei tep ter tes tet tgb tge tgg tgi tgp tgr tgs tgt tib tie tig tii tip tir tis tit tpb tpe tpg tpi tpp tpr tps tpt trb tre trg tri trp trr trs trt tsb tse tsg tsi tsp tsr tss tst ttb tte ttg tti ttp ttr tts ttt