-ol bbb bbi bbl bbo bbr bbx bi- bib bii bil bio bir biv bix blb bli bll blo blr blv blx bob boi bol boo bor bov box brb bri brl bro brr brv brx bvb bvi bvl bvo bvr bvv bxb bxi bxl bxo bxx i-v ibb ibi ibl ibo ibr ibv ibx iib iii iil iio iir iix il- ilb ili ill ilo ilr ilv ilx io- iob ioi iol ioo ior iov ir- irb iri irl iro irr irv irx ivb ivi ivl ivo ivr ivv ivx ixi ixl lbb lbi lbl lbo lbr lbv lbx lib lii lil lio lir liv lix llb lli lll llo llr llv lob loi lol loo lor lov lox lrb lri lro lrr lrv lvb lvi lvl lvr lvv lvx lxi lxo lxr lxv lxx o-i ob- obb obi obl obo obr obv obx oib oii oil oio oir oiv olb oli oll olo oo- oob ooi ool ooo oor oov oox or- orb ori orl oro orr orv orx ov- ovb ovi ovl ovo ovv ox- oxb oxi oxo oxx rbb rbi rbl rbo rbr rbx rib rii ril rio rir riv rix rli rll rlo rlr rob roi rol roo ror rov rox rrb rri rrl rrr rvb rvi rvl rvo rvr rvv rxr vbi vbl vbo vbr vbv vi- vib vii vil vio vir viv vix vl- vlb vll vlo vlv vob voi vol voo vor vov vox vrb vri vrr vvb vvi vvo vvr vvv vxl vxr vxv xbl xbr xbx xii xio xiv xix xlb xli xlr xlv xoi xoo xor xov xox xrx xvi xvl xxi xxl xxo xxv xxx