-ol bbb bbi bbl bbo bbr bi- bib bii bil bio bir biz blb bli bll blo blr blz bob boi bol boo bor boz brb bri brl bro brr brz bzo bzr bzz ibb ibi ibl ibo ibr ibz iib iii iil iio iir il- ilb ili ill ilo ilr ilz io- iob ioi iol ioo ior ir- irb iri irl iro irr izi izo izz lbb lbi lbl lbo lbr lib lii lil lio lir liz llb lli lll llo llr llz lob loi lol loo lor loz lrb lri lro lrr lrz lzi lzo lzr o-i ob- obb obi obl obo obr oib oii oil oio oir oiz olb oli oll olo oo- oob ooi ool ooo oor or- orb ori orl oro orr orz ozo ozz rbb rbi rbl rbo rbr rib rii ril rio rir riz rli rll rlo rlr rob roi rol roo ror roz rrb rri rrl rrr rzb rzo zbb zbl zbr zib zil zio zir ziz zlr zo- zob zoi zol zoo zor zrl zro zzr zzz