-ic -ol bbb bbc bbi bbl bbo bbr bbs bcb bcc bci bcl bco bcr bcs bi- bib bic bii bil bio bir bis blb blc bli bll blo blr bls bob boc boi bol boo bor bos brb bri brl bro brr brs bsb bsc bsi bsl bso bsr bss c-- cbb cbc cbi cbl cbo cbr cbs ccb ccc cci ccl cco ccr ccs ci- cib cic cii cil cio cir cis cl- clb clc cli cll clo clr cls co- cob coc coi col coo cor cos crb crc cri crl cro crr crs csb csc csi csl cso csr css ibb ibc ibi ibl ibo ibr ibs icb icc ici icl ico icr ics iib iic iii iil iio iir iis il- ilb ilc ili ill ilo ilr ils io- iob ioc ioi iol ioo ior ios ir- irb irc iri irl iro irr irs is- isb isc isi isl iso isr iss lbb lbc lbi lbl lbo lbr lbs lcb lcc lci lcl lco lcr lcs lib lic lii lil lio lir lis llb llc lli lll llo llr lls lob loc loi lol loo lor los lrb lrc lri lro lrr lrs lsb lsc lsi lsl lso lsr lss o-i ob- obb obc obi obl obo obr obs oc- ocb occ oci ocl oco ocr ocs oib oic oii oil oio oir ois olb olc oli oll olo ols oo- oob ooc ooi ool ooo oor oos or- orb orc ori orl oro orr ors os- osb osc osi osl oso osr oss rbb rbc rbi rbl rbo rbr rbs rcb rcc rci rcl rco rcr rcs rib ric rii ril rio rir ris rlc rli rll rlo rlr rls rob roc roi rol roo ror ros rrb rrc rri rrl rrr rrs rsb rsc rsi rsl rso rsr rss sbb sbc sbi sbl sbo sbr sbs scb scc sci scl sco scr scs sib sic sii sil sio sir sis slb slc sli sll slo slr sls sob soc soi sol soo sor sos sr- srb src sri srl sro srr srs ss- ssb ssc ssi ssl sso ssr sss