-er bbb bbd bbe bbi bbk bbr bdb bdd bde bdi bdk bdr bdv be- beb bed bee bei bek ber bev bi- bib bid bie bii bik bir biv bkb bke bkk bkr bkv brb brd bre bri brk brr brv bvb bvd bve bvi bvk bvr bvv dbb dbd dbe dbi dbk dbr dbv ddb ddd dde ddi ddk ddr de- deb ded dee dei dek der dev di- dib did die dii dik dir div dkb dke dki dkk dkr drb drd dre dri drk drr drv dvb dvd dve dvi dvk dvr ebb ebd ebe ebi ebk ebr ebv ed- edb edd ede edi edk edr eeb eed eee eek eer eev eib eid eie eii eik eir eiv ekb ekd eke eki ekr ekv erb erd ere eri erk err erv evb evd eve evi evr evv i-d i-v ibb ibd ibe ibi ibk ibr ibv idb idd ide idi idk idr idv ie- ied iee iei iek ier iev iib iid iie iii iir ikb ike iki ikk ikr ikv ir- irb ird ire iri irk irr irv ivb ivd ive ivi ivr ivv kbb kbd kbe kbi kbk kbr kdb kde kdk kdr ke- keb ked kee kei kek ker kev kib kid kie kii kik kir kiv kkb kke kki kkk kkr kkv krd kri krk krr krv kvb kvi kvk kvr kvv rbb rbd rbe rbi rbk rbr rdb rdd rde rdi rdr rdv re- reb red ree rei rek rer rev rib rid rie rii rik rir riv rkb rke rkk rkv rrb rrd rri rrk rrr rvb rvd rve rvi rvr rvv v-e vbd vbi vbk vbr vbv vdb vdd vde vdi vdk vdr vdv veb ved vee vei vek ver vi- vib vid vie vii vik vir viv vkb vrb vrd vre vri vrk vrr vvb vvi vvr vvv