-er bbb bbe bbi bbk bbo bbr bbw be- beb bee bei bek beo ber bev bew bi- bib bie bii bik bio bir biv biw bkb bke bkk bko bkr bkv bkw bob boe boi bok boo bor bov bow brb bre bri brk bro brr brv brw bvb bve bvi bvk bvo bvr bvv bvw bwb bwi bwk bwo bwr bwv ebb ebe ebi ebk ebo ebr ebv ebw eeb eee eek eeo eer eev eew eib eie eii eik eio eir eiv ekb eke eki eko ekr ekv eo- eob eoe eoi eok eoo eor eow erb ere eri erk ero err erv erw evb eve evi evo evr evv evw ewb ewe ewi ewk ewo ewr eww i-v ibb ibe ibi ibk ibo ibr ibv ibw ie- iee iei iek ier iev iib iie iii iio iir iiw ikb ike iki ikk iko ikr ikv io- iob ioe ioi ioo ior iov iow ir- irb ire iri irk iro irr irv ivb ive ivi ivo ivr ivv iwb iwe iwi iwk iwo iwr iww kbb kbe kbi kbk kbo kbr kbw ke- keb kee kei kek keo ker kev kew kib kie kii kik kio kir kiv kkb kke kki kkk kkr kkv kob koe koi kok koo kor kow kri krk kro krr krv krw kvb kvi kvk kvo kvr kvv kw- kwi kwk kwo kww o-i ob- obb obe obi obk obo obr obv obw oeb oee oei oeo oer oib oie oii oik oio oir oiv okb oke oki okk oko okr okw oo- oob ooi ook ooo oor oov oow or- orb ore ori ork oro orr orv ov- ovb ove ovi ovo ovv owb owe owi owk owo oww rbb rbe rbi rbk rbo rbr rbw re- reb ree rei rek reo rer rev rew rib rie rii rik rio rir riv rkb rke rkk rko rkv rob roe roi rok roo ror rov row rrb rri rrk rrr rvb rve rvi rvo rvr rvv rvw rwb rwe rwi rwr v-e vbi vbk vbo vbr vbv vbw veb vee vei vek veo ver vew vi- vib vie vii vik vio vir viv vkb vob voe voi vok voo vor vov vow vrb vre vri vrk vrr vvb vvi vvo vvr vvv vwo wbb wbe wbi wbo wbr wbw web wee wei wek weo wer wew wib wie wii wik wir wiv wkb wke wko wkr wkw wob woe woi wok woo wor wow wr- wre wri wrk wro wrr wrw wvw wwe wwi wwo wwv www