-ol bbb bbe bbi bbl bbo be- beb bee bei bel beo bev bi- bib bie bii bil bio biv blb ble bli bll blo blv bob boe boi bol boo bov bvb bve bvi bvl bvo bvv ebb ebe ebi ebl ebo ebv eeb eee eel eeo eev eib eie eii eil eio eiv elb ele eli ell elo elv eo- eob eoe eoi eol eoo evb eve evi evl evo evv i-v ibb ibe ibi ibl ibo ibv ie- iee iei iel iev iib iie iii iil iio il- ilb ile ili ill ilo ilv io- iob ioe ioi iol ioo iov ivb ive ivi ivl ivo ivv lbb lbe lbi lbl lbo lbv leb lee lei lel leo lev lib lie lii lil lio liv llb lle lli lll llo llv lob loe loi lol loo lov lvb lve lvi lvl lvv o-i ob- obb obe obi obl obo obv oeb oee oei oel oeo oib oie oii oil oio oiv olb ole oli oll olo oo- oob ooi ool ooo oov ov- ovb ove ovi ovl ovo ovv v-e vbi vbl vbo vbv veb vee vei vel veo vi- vib vie vii vil vio viv vl- vlb vle vll vlo vlv vob voe voi vol voo vov vvb vvi vvo vvv