-ol b-u bbb bbi bbl bbo bbr bbu bi- bib bii bil bio bir biu biv blb bli bll blo blr blu blv bob boi bol boo bor bou bov brb bri brl bro brr bru brv bub bui bul buo bur buu bvb bvi bvl bvo bvr bvu bvv i-v ibb ibi ibl ibo ibr ibu ibv iib iii iil iio iir iiu il- ilb ili ill ilo ilr ilu ilv io- iob ioi iol ioo ior iou iov ir- irb iri irl iro irr iru irv iu- iub iui iur ivb ivi ivl ivo ivr ivu ivv lbb lbi lbl lbo lbr lbu lbv lib lii lil lio lir liu liv llb lli lll llo llr llu llv lob loi lol loo lor lou lov lrb lri lro lrr lru lrv lub lui lul luo lur luu luv lvb lvi lvl lvr lvv o-i ob- obb obi obl obo obr obu obv oib oii oil oio oir oiu oiv olb oli oll olo olu oo- oob ooi ool ooo oor oov or- orb ori orl oro orr oru orv ou- oui oul ouo our ov- ovb ovi ovl ovo ovv rbb rbi rbl rbo rbr rbu rib rii ril rio rir riv rli rll rlo rlr rlu rob roi rol roo ror rou rov rrb rri rrl rrr rru rub rui ruo rur ruu ruv rvb rvi rvl rvo rvr rvu rvv ubb ubi ubl ubo ubr ubu ubv uib uii uil uio uir uiu ulb uli ull ulo ulr ulu ulv uob uol uoo uor ur- urb uri url uro urr uru uur uuu uvb uvl uvo uvu uvv vbi vbl vbo vbr vbv vi- vib vii vil vio vir viu viv vl- vlb vll vlo vlv vob voi vol voo vor vou vov vrb vri vrr vru vul vur vuv vvb vvi vvo vvr vvv