-ic -ol bbb bbc bbi bbk bbl bbo bcb bcc bci bck bcl bco bi- bib bic bii bik bil bio bkb bkc bkk bkl bko blb blc bli blk bll blo bob boc boi bok bol boo c-- cbb cbc cbi cbk cbl cbo ccb ccc cci cck ccl cco ci- cib cic cii cik cil cio ckb ckc cki cko cl- clb clc cli clk cll clo co- cob coc coi cok col coo ibb ibc ibi ibk ibl ibo icb icc ici ick icl ico iib iic iii iil iio ikb ikc iki ikk ikl iko il- ilb ilc ili ilk ill ilo io- iob ioc ioi iol ioo kbb kbc kbi kbk kbl kbo kcb kcc kci kck kcl kib kic kii kik kil kio kkb kkc kki kkk kkl kl- klb klc kli klo kob koc koi kok kol koo lbb lbc lbi lbk lbl lbo lcb lcc lci lck lcl lco lib lic lii lik lil lio lkb lkl llb llc lli llk lll llo lob loc loi lok lol loo o-i ob- obb obc obi obk obl obo oc- ocb occ oci ock ocl oco oib oic oii oik oil oio okb okc oki okk okl oko olb olc oli olk oll olo oo- oob ooc ooi ook ool ooo