-er b-p bbb bbe bbg bbi bbp bbr bbt be- beb bee beg bei bep ber bet bgb bge bgg bgi bgp bgr bgt bi- bib bie big bii bip bir bit bpb bpe bpg bpi bpp bpr bpt brb bre brg bri brp brr brt btb bte btg bti btp btr btt ebb ebe ebg ebi ebp ebr ebt eeb eee eeg eep eer eet egb ege egg egi egp egr egt eib eie eig eii eip eir eit ep- epb epe epg epi epp epr ept erb ere erg eri erp err ert etb ete etg eti etp etr ett g-p gbe gbg gbi gbp gbr gbt ge- geb gee geg gei gep ger get ggb ggg ggi ggp ggr ggt gib gie gig gii gip gir git gpb gpe gpg gpi gpp gpr gpt grb gre grg gri grp grr grt gtb gte gtg gti gtp gtr gtt ibb ibe ibg ibi ibp ibr ibt ie- iee ieg iei iep ier iet igb ige igg igi igp igr igt iib iie iii iip iir iit ipb ipe ipg ipi ipp ipr ipt ir- irb ire irg iri irp irr irt itb ite itg iti itp itt p-p pbb pbe pbg pbi pbp pbr pbt peb pee peg pei pep per pet pgb pge pgg pgi pgp pgr pgt pib pie pig pii pip pir pit ppb ppe ppg ppi ppp ppr ppt prb pre prg pri prp prr prt pt- ptb pte ptg pti ptp ptr ptt rbb rbe rbg rbi rbp rbr rbt re- reb ree reg rei rep rer ret rgb rge rgg rgi rgp rgr rgt rib rie rig rii rip rir rit rpb rpe rpg rpi rpp rpr rpt rrb rrg rri rrp rrr rrt rtb rte rtg rti rtp rtr rtt tbb tbe tbg tbi tbp tbr tbt te- teb tee teg tei tep ter tet tgb tge tgg tgi tgp tgr tgt tib tie tig tii tip tir tit tpb tpe tpg tpi tpp tpr tpt trb tre trg tri trp trr trt ttb tte ttg tti ttp ttr ttt