-er bbb bbd bbe bbi bbr bdb bdd bde bdi bdr bdv bdz be- beb bed bee bei ber bev bez bi- bib bid bie bii bir biv biz brb brd bre bri brr brv brz bvb bvd bve bvi bvr bvv bzd bze bzr bzz dbb dbd dbe dbi dbr dbv dbz ddb ddd dde ddi ddr ddz de- deb ded dee dei der dev dez di- dib did die dii dir div diz drb drd dre dri drr drv drz dvb dvd dve dvi dvr dzb dzd dze dzi dzr ebb ebd ebe ebi ebr ebv ed- edb edd ede edi edr eeb eed eee eer eev eib eid eie eii eir eiv erb erd ere eri err erv erz evb evd eve evi evr evv eze ezr ezz i-d i-v ibb ibd ibe ibi ibr ibv ibz idb idd ide idi idr idv ie- ied iee iei ier iev iib iid iie iii iir ir- irb ird ire iri irr irv ivb ivd ive ivi ivr ivv ize izi izz rbb rbd rbe rbi rbr rdb rdd rde rdi rdr rdv re- reb red ree rei rer rev rez rib rid rie rii rir riv riz rrb rrd rri rrr rvb rvd rve rvi rvr rvv rzb rze v-e vbd vbi vbr vbv vbz vdb vdd vde vdi vdr vdv veb ved vee vei ver vez vi- vib vid vie vii vir viv viz vrb vrd vre vri vrr vvb vvi vvr vvv vvz zbb zbr zbv zdv zeb zed zee zer zev zez zib zid zie zir ziv ziz zvi zzr zzz