-ic -ol bbb bbc bbi bbl bbo bbr bcb bcc bci bcl bco bcr bi- bib bic bii bil bio bir blb blc bli bll blo blr bob boc boi bol boo bor brb bri brl bro brr c-- cbb cbc cbi cbl cbo cbr ccb ccc cci ccl cco ccr ci- cib cic cii cil cio cir cl- clb clc cli cll clo clr co- cob coc coi col coo cor crb crc cri crl cro crr ibb ibc ibi ibl ibo ibr icb icc ici icl ico icr iib iic iii iil iio iir il- ilb ilc ili ill ilo ilr io- iob ioc ioi iol ioo ior ir- irb irc iri irl iro irr lbb lbc lbi lbl lbo lbr lcb lcc lci lcl lco lcr lib lic lii lil lio lir llb llc lli lll llo llr lob loc loi lol loo lor lrb lrc lri lro lrr o-i ob- obb obc obi obl obo obr oc- ocb occ oci ocl oco ocr oib oic oii oil oio oir olb olc oli oll olo oo- oob ooc ooi ool ooo oor or- orb orc ori orl oro orr rbb rbc rbi rbl rbo rbr rcb rcc rci rcl rco rcr rib ric rii ril rio rir rlc rli rll rlo rlr rob roc roi rol roo ror rrb rrc rri rrl rrr