-er -ic -ol bbb bbc bbe bbi bbl bbo bbr bbs bcb bcc bce bci bcl bco bcr bcs be- beb bec bee bei bel beo ber bes bi- bib bic bie bii bil bio bir bis blb blc ble bli bll blo blr bls bob boc boe boi bol boo bor bos brb bre bri brl bro brr brs bsb bsc bse bsi bsl bso bsr bss c-- cbb cbc cbe cbi cbl cbo cbr cbs ccb ccc cce cci ccl cco ccr ccs ce- ceb cec cee cei cel ceo cer ces ci- cib cic cie cii cil cio cir cis cl- clb clc cle cli cll clo clr cls co- cob coc coe coi col coo cor cos crb crc cre cri crl cro crr crs csb csc cse csi csl cso csr css ebb ebc ebe ebi ebl ebo ebr ebs ec- ecb ecc ece eci ecl eco ecr ecs eeb eec eee eel eeo eer ees eib eic eie eii eil eio eir eis elb elc ele eli ell elo elr els eo- eob eoc eoe eoi eol eoo eor eos erb erc ere eri erl ero err ers es- esb esc ese esi esl eso esr ess ibb ibc ibe ibi ibl ibo ibr ibs icb icc ice ici icl ico icr ics ie- iec iee iei iel ier ies iib iic iie iii iil iio iir iis il- ilb ilc ile ili ill ilo ilr ils io- iob ioc ioe ioi iol ioo ior ios ir- irb irc ire iri irl iro irr irs is- isb isc ise isi isl iso isr iss lbb lbc lbe lbi lbl lbo lbr lbs lcb lcc lce lci lcl lco lcr lcs leb lec lee lei lel leo ler les lib lic lie lii lil lio lir lis llb llc lle lli lll llo llr lls lob loc loe loi lol loo lor los lrb lrc lri lro lrr lrs lsb lsc lse lsi lsl lso lsr lss o-i ob- obb obc obe obi obl obo obr obs oc- ocb occ oci ocl oco ocr ocs oeb oec oee oei oel oeo oer oes oib oic oie oii oil oio oir ois olb olc ole oli oll olo ols oo- oob ooc ooi ool ooo oor oos or- orb orc ore ori orl oro orr ors os- osb osc ose osi osl oso osr oss rbb rbc rbe rbi rbl rbo rbr rbs rcb rcc rce rci rcl rco rcr rcs re- reb rec ree rei rel reo rer res rib ric rie rii ril rio rir ris rlc rle rli rll rlo rlr rls rob roc roe roi rol roo ror ros rrb rrc rri rrl rrr rrs rsb rsc rse rsi rsl rso rsr rss sbb sbc sbe sbi sbl sbo sbr sbs scb scc sce sci scl sco scr scs se- seb sec see sei sel seo ser ses sib sic sie sii sil sio sir sis slb slc sle sli sll slo slr sls sob soc soe soi sol soo sor sos sr- srb src sre sri srl sro srr srs ss- ssb ssc sse ssi ssl sso ssr sss