-ol bbb bbe bbi bbk bbl bbo bbt be- beb bee bei bek bel beo bet bev bi- bib bie bii bik bil bio bit biv bkb bke bkk bkl bko bkt bkv blb ble bli blk bll blo blt blv bob boe boi bok bol boo bot bov btb bte bti btk btl bto btt btv bvb bve bvi bvk bvl bvo bvt bvv ebb ebe ebi ebk ebl ebo ebt ebv eeb eee eek eel eeo eet eev eib eie eii eik eil eio eit eiv ekb eke eki ekl eko ekt ekv elb ele eli elk ell elo elt elv eo- eob eoe eoi eok eol eoo eot etb ete eti etk etl eto ett etv evb eve evi evl evo evt evv i-v ibb ibe ibi ibk ibl ibo ibt ibv ie- iee iei iek iel iet iev iib iie iii iil iio iit ikb ike iki ikk ikl iko ikt ikv il- ilb ile ili ilk ill ilo ilt ilv io- iob ioe ioi iol ioo iot iov itb ite iti itk itl ito itt itv ivb ive ivi ivl ivo ivt ivv k-t kbb kbe kbi kbk kbl kbo ke- keb kee kei kek kel keo ket kev kib kie kii kik kil kio kit kiv kkb kke kki kkk kkl kkt kkv kl- klb kli klo klt klv kob koe koi kok kol koo kot ktb kte ktk ktl kto ktt ktv kvb kvi kvk kvo kvv lbb lbe lbi lbk lbl lbo lbt lbv leb lee lei lek lel leo let lev lib lie lii lik lil lio lit liv lkb lkl lkt llb lle lli llk lll llo llt llv lob loe loi lok lol loo lot lov ltb lte lti ltk ltl lto ltt ltv lvb lve lvi lvl lvt lvv o-i ob- obb obe obi obk obl obo obt obv oeb oee oei oel oeo oet oib oie oii oik oil oio oit oiv okb oke oki okk okl oko olb ole oli olk oll olo olt oo- oob ooi ook ool ooo oot oov ot- otb ote oti otk otl oto ott otv ov- ovb ove ovi ovl ovo ovv tbb tbe tbi tbk tbl tbo tbt tbv te- teb tee tei tek tel teo tet tev tib tie tii tik til tio tit tiv tkb tke tkk tkl tko tkt tle tli tlk tll tlo tlt tlv to- tob toe toi tok tol too tot tov ttb tte tti ttk ttl tto ttt ttv tvb tve tvi tvk tvl tvo tvt v-e vbi vbk vbl vbo vbv veb vee vei vek vel veo vet vi- vib vie vii vik vil vio vit viv vkb vkt vl- vlb vle vlk vll vlo vlt vlv vob voe voi vok vol voo vot vov vtb vte vti vtk vtl vto vtt vtv vvb vvi vvo vvt vvv