-er -ic b-u bbb bbc bbe bbi bbl bbr bbu bcb bcc bce bci bcl bcr bcu be- beb bec bee bei bel ber beu bi- bib bic bie bii bil bir biu blb blc ble bli bll blr blu brb bre bri brl brr bru bub buc bue bui bul bur buu c-- cbb cbc cbe cbi cbl cbr cbu ccb ccc cce cci ccl ccr ccu ce- ceb cec cee cei cel cer ceu ci- cib cic cie cii cil cir ciu cl- clb clc cle cli cll clr clu crb crc cre cri crl crr cru cub cuc cue cui cul cur cuu ebb ebc ebe ebi ebl ebr ebu ec- ecb ecc ece eci ecl ecr ecu eeb eec eee eel eer eib eic eie eii eil eir eiu elb elc ele eli ell elr elu erb erc ere eri erl err eru eu- eub euc eue eui eul eur ibb ibc ibe ibi ibl ibr ibu icb icc ice ici icl icr icu ie- iec iee iei iel ier iib iic iie iii iil iir iiu il- ilb ilc ile ili ill ilr ilu ir- irb irc ire iri irl irr iru iu- iub iuc iue iui iur lbb lbc lbe lbi lbl lbr lbu lcb lcc lce lci lcl lcr lcu leb lec lee lei lel ler leu lib lic lie lii lil lir liu llb llc lle lli lll llr llu lrb lrc lri lrr lru lub luc lue lui lul lur luu rbb rbc rbe rbi rbl rbr rbu rcb rcc rce rci rcl rcr rcu re- reb rec ree rei rel rer reu rib ric rie rii ril rir rlc rle rli rll rlr rlu rrb rrc rri rrl rrr rru rub ruc rue rui rur ruu ubb ubc ube ubi ubl ubr ubu ucb ucc uce uci ucl ucr ucu ueb uec uee uei uel uer uib uic uie uii uil uir uiu ulb ulc ule uli ull ulr ulu ur- urb urc ure uri url urr uru uuc uue uur uuu