-er b-p bbb bbe bbg bbi bbk bbp bbr bbt be- beb bee beg bei bek bep ber bet bgb bge bgg bgi bgk bgp bgr bgt bi- bib bie big bii bik bip bir bit bkb bke bkg bkk bkp bkr bkt bpb bpe bpg bpi bpp bpr bpt brb bre brg bri brk brp brr brt btb bte btg bti btk btp btr btt ebb ebe ebg ebi ebk ebp ebr ebt eeb eee eeg eek eep eer eet egb ege egg egi egp egr egt eib eie eig eii eik eip eir eit ekb eke ekg eki ekp ekr ekt ep- epb epe epg epi epp epr ept erb ere erg eri erk erp err ert etb ete etg eti etk etp etr ett g-p gbe gbg gbi gbk gbp gbr gbt ge- geb gee geg gei gek gep ger get ggb ggg ggi ggp ggr ggt gib gie gig gii gik gip gir git gkb gkp gkt gpb gpe gpg gpi gpk gpp gpr gpt grb gre grg gri grk grp grr grt gtb gte gtg gti gtk gtp gtr gtt ibb ibe ibg ibi ibk ibp ibr ibt ie- iee ieg iei iek iep ier iet igb ige igg igi igk igp igr igt iib iie iii iip iir iit ikb ike iki ikk ikr ikt ipb ipe ipg ipi ipp ipr ipt ir- irb ire irg iri irk irp irr irt itb ite itg iti itk itp itt k-t kbb kbe kbi kbk kbp kbr ke- keb kee keg kei kek kep ker ket kgb kgi kgp kib kie kig kii kik kip kir kit kkb kke kki kkk kkp kkr kkt kpe kpi kpk kpp kpr kpt krg kri krk krp krr krt ktb kte ktg ktk ktp ktr ktt p-p pbb pbe pbg pbi pbk pbp pbr pbt peb pee peg pei pek pep per pet pgb pge pgg pgi pgk pgp pgr pgt pib pie pig pii pik pip pir pit pkb pke pkg pki pkp pkr pkt ppb ppe ppg ppi ppk ppp ppr ppt prb pre prg pri prk prp prr prt pt- ptb pte ptg pti ptk ptp ptr ptt rbb rbe rbg rbi rbk rbp rbr rbt re- reb ree reg rei rek rep rer ret rgb rge rgg rgi rgk rgp rgr rgt rib rie rig rii rik rip rir rit rkb rke rkg rkk rkp rkt rpb rpe rpg rpi rpk rpp rpr rpt rrb rrg rri rrk rrp rrr rrt rtb rte rtg rti rtk rtp rtr rtt tbb tbe tbg tbi tbk tbp tbr tbt te- teb tee teg tei tek tep ter tet tgb tge tgg tgi tgk tgp tgr tgt tib tie tig tii tik tip tir tit tkb tke tkg tkk tkp tkr tkt tpb tpe tpg tpi tpk tpp tpr tpt trb tre trg tri trk trp trr trt ttb tte ttg tti ttk ttp ttr ttt