-ic -ol bbb bbc bbi bbk bbl bbo bbs bcb bcc bci bck bcl bco bcs bi- bib bic bii bik bil bio bis bkb bkc bkk bkl bko bks blb blc bli blk bll blo bls bob boc boi bok bol boo bos bsb bsc bsi bsk bsl bso bss c-- cbb cbc cbi cbk cbl cbo cbs ccb ccc cci cck ccl cco ccs ci- cib cic cii cik cil cio cis ckb ckc cki cko cks cl- clb clc cli clk cll clo cls co- cob coc coi cok col coo cos csb csc csi csk csl cso css ibb ibc ibi ibk ibl ibo ibs icb icc ici ick icl ico ics iib iic iii iil iio iis ikb ikc iki ikk ikl iko iks il- ilb ilc ili ilk ill ilo ils io- iob ioc ioi iol ioo ios is- isb isc isi isk isl iso iss kbb kbc kbi kbk kbl kbo kbs kcb kcc kci kck kcl kcs kib kic kii kik kil kio kis kkb kkc kki kkk kkl kks kl- klb klc kli klo kls kob koc koi kok kol koo kos ksb ksc ksi ksk ksl kso kss lbb lbc lbi lbk lbl lbo lbs lcb lcc lci lck lcl lco lcs lib lic lii lik lil lio lis lkb lkl lks llb llc lli llk lll llo lls lob loc loi lok lol loo los lsb lsc lsi lsk lsl lso lss o-i ob- obb obc obi obk obl obo obs oc- ocb occ oci ock ocl oco ocs oib oic oii oik oil oio ois okb okc oki okk okl oko oks olb olc oli olk oll olo ols oo- oob ooc ooi ook ool ooo oos os- osb osc osi osk osl oso oss sbb sbc sbi sbk sbl sbo sbs scb scc sci sck scl sco scs sib sic sii sik sil sio sis sk- skb skc ski skk skl sko sks slb slc sli slk sll slo sls sob soc soi sok sol soo sos ss- ssb ssc ssi ssk ssl sso sss