-ic -ol bbb bbc bbi bbl bbo bcb bcc bci bcl bco bi- bib bic bii bil bio blb blc bli bll blo bob boc boi bol boo c-- cbb cbc cbi cbl cbo ccb ccc cci ccl cco ci- cib cic cii cil cio cl- clb clc cli cll clo co- cob coc coi col coo ibb ibc ibi ibl ibo icb icc ici icl ico iib iic iii iil iio il- ilb ilc ili ill ilo io- iob ioc ioi iol ioo lbb lbc lbi lbl lbo lcb lcc lci lcl lco lib lic lii lil lio llb llc lli lll llo lob loc loi lol loo o-i ob- obb obc obi obl obo oc- ocb occ oci ocl oco oib oic oii oil oio olb olc oli oll olo oo- oob ooc ooi ool ooo