-er b-p bbb bbd bbe bbg bbi bbp bbr bbt bbx bdb bdd bde bdg bdi bdp bdr bdt bdx be- beb bed bee beg bei bep ber bet bex bgb bgd bge bgg bgi bgp bgr bgt bgx bi- bib bid bie big bii bip bir bit bix bpb bpd bpe bpg bpi bpp bpr bpt bpx brb brd bre brg bri brp brr brt brx btb btd bte btg bti btp btr btt btx bxb bxd bxi bxx dbb dbd dbe dbg dbi dbp dbr dbt dbx ddb ddd dde ddg ddi ddp ddr ddt ddx de- deb ded dee deg dei dep der det dex dgd dge dgg dgi dgp dgr dgt di- dib did die dig dii dip dir dit dix dpb dpd dpe dpg dpi dpp dpr dpt drb drd dre drg dri drp drr drt drx dtb dtd dte dtg dti dtp dtr dtt dtx dxd dxi dxp dxr dxt dxx ebb ebd ebe ebg ebi ebp ebr ebt ebx ed- edb edd ede edg edi edp edr edt edx eeb eed eee eeg eep eer eet eex egb egd ege egg egi egp egr egt egx eib eid eie eig eii eip eir eit eix ep- epb epd epe epg epi epp epr ept epx erb erd ere erg eri erp err ert etb etd ete etg eti etp etr ett etx ex- exd exe exi exp exr ext exx g-d g-p gbd gbe gbg gbi gbp gbr gbt gbx gdb gdd gde gdi gdp gdr gdt gdx ge- geb ged gee geg gei gep ger get gex ggb ggd ggg ggi ggp ggr ggt gib gid gie gig gii gip gir git gpb gpd gpe gpg gpi gpp gpr gpt gpx grb grd gre grg gri grp grr grt grx gtb gtd gte gtg gti gtp gtr gtt gtx gxp gxt i-d ibb ibd ibe ibg ibi ibp ibr ibt ibx idb idd ide idg idi idp idr idt idx ie- ied iee ieg iei iep ier iet iex igb igd ige igg igi igp igr igt iib iid iie iii iip iir iit iix ipb ipd ipe ipg ipi ipp ipr ipt ipx ir- irb ird ire irg iri irp irr irt irx itb itd ite itg iti itp itt itx ixe ixi p-p pbb pbd pbe pbg pbi pbp pbr pbt pbx pdb pdd pde pdg pdi pdp pdr pdt pdx peb ped pee peg pei pep per pet pex pgb pgd pge pgg pgi pgp pgr pgt pib pid pie pig pii pip pir pit pix ppb ppd ppe ppg ppi ppp ppr ppt ppx prb prd pre prg pri prp prr prt prx pt- ptb ptd pte ptg pti ptp ptr ptt ptx pxe pxg pxr pxt rbb rbd rbe rbg rbi rbp rbr rbt rbx rdb rdd rde rdg rdi rdp rdr rdt rdx re- reb red ree reg rei rep rer ret rex rgb rgd rge rgg rgi rgp rgr rgt rgx rib rid rie rig rii rip rir rit rix rpb rpd rpe rpg rpi rpp rpr rpt rpx rrb rrd rrg rri rrp rrr rrt rtb rtd rte rtg rti rtp rtr rtt rtx rxp rxr t-x tbb tbd tbe tbg tbi tbp tbr tbt tdb tdd tde tdg tdi tdp tdr tdt tdx te- teb ted tee teg tei tep ter tet tex tgb tge tgg tgi tgp tgr tgt tib tid tie tig tii tip tir tit tix tpb tpd tpe tpg tpi tpp tpr tpt tpx trb trd tre trg tri trp trr trt trx ttb ttd tte ttg tti ttp ttr ttt ttx txe txi txt xbe xbr xbx xdb xde xdi xdr xdt xed xee xeg xep xer xet xex xge xgi xgp xie xii xit xix xpb xpd xpe xpg xpp xpt xrd xrt xrx xti xtp xtr xtx xxi xxp xxx