-er -ic -ol b-u bbb bbc bbe bbi bbl bbo bbr bbu bcb bcc bce bci bcl bco bcr bcu be- beb bec bee bei bel beo ber beu bi- bib bic bie bii bil bio bir biu blb blc ble bli bll blo blr blu bob boc boe boi bol boo bor bou brb bre bri brl bro brr bru bub buc bue bui bul buo bur buu c-- cbb cbc cbe cbi cbl cbo cbr cbu ccb ccc cce cci ccl cco ccr ccu ce- ceb cec cee cei cel ceo cer ceu ci- cib cic cie cii cil cio cir ciu cl- clb clc cle cli cll clo clr clu co- cob coc coe coi col coo cor cou crb crc cre cri crl cro crr cru cub cuc cue cui cul cuo cur cuu ebb ebc ebe ebi ebl ebo ebr ebu ec- ecb ecc ece eci ecl eco ecr ecu eeb eec eee eel eeo eer eib eic eie eii eil eio eir eiu elb elc ele eli ell elo elr elu eo- eob eoc eoe eoi eol eoo eor eou erb erc ere eri erl ero err eru eu- eub euc eue eui eul eur ibb ibc ibe ibi ibl ibo ibr ibu icb icc ice ici icl ico icr icu ie- iec iee iei iel ier iib iic iie iii iil iio iir iiu il- ilb ilc ile ili ill ilo ilr ilu io- iob ioc ioe ioi iol ioo ior iou ir- irb irc ire iri irl iro irr iru iu- iub iuc iue iui iur lbb lbc lbe lbi lbl lbo lbr lbu lcb lcc lce lci lcl lco lcr lcu leb lec lee lei lel leo ler leu lib lic lie lii lil lio lir liu llb llc lle lli lll llo llr llu lob loc loe loi lol loo lor lou lrb lrc lri lro lrr lru lub luc lue lui lul luo lur luu o-i ob- obb obc obe obi obl obo obr obu oc- ocb occ oci ocl oco ocr ocu oeb oec oee oei oel oeo oer oib oic oie oii oil oio oir oiu olb olc ole oli oll olo olu oo- oob ooc ooi ool ooo oor or- orb orc ore ori orl oro orr oru ou- ouc oue oui oul ouo our rbb rbc rbe rbi rbl rbo rbr rbu rcb rcc rce rci rcl rco rcr rcu re- reb rec ree rei rel reo rer reu rib ric rie rii ril rio rir rlc rle rli rll rlo rlr rlu rob roc roe roi rol roo ror rou rrb rrc rri rrl rrr rru rub ruc rue rui ruo rur ruu ubb ubc ube ubi ubl ubo ubr ubu ucb ucc uce uci ucl uco ucr ucu ueb uec uee uei uel uer uib uic uie uii uil uio uir uiu ulb ulc ule uli ull ulo ulr ulu uob uoc uoe uol uoo uor ur- urb urc ure uri url uro urr uru uuc uue uur uuu