-er -ic b-u bbb bbc bbe bbi bbn bbr bbu bcb bcc bce bci bcn bcr bcu be- beb bec bee bei ben ber beu bi- bib bic bie bii bin bir biu bnb bnc bne bni bnn bnr bnu brb bre bri brn brr bru bub buc bue bui bun bur buu c-- cbb cbc cbe cbi cbn cbr cbu ccb ccc cce cci ccn ccr ccu ce- ceb cec cee cei cen cer ceu ci- cib cic cie cii cin cir ciu cn- cnb cnc cne cni cnn cnr cnu crb crc cre cri crn crr cru cub cuc cue cui cun cur cuu ebb ebc ebe ebi ebn ebr ebu ec- ecb ecc ece eci ecn ecr ecu eeb eec eee een eer eib eic eie eii ein eir eiu en- enb enc ene eni enn enr enu erb erc ere eri ern err eru eu- eub euc eue eui eun eur ibb ibc ibe ibi ibn ibr ibu icb icc ice ici icn icr icu ie- iec iee iei ien ier iib iic iie iii iin iir iiu in- inb inc ine ini inn inr inu ir- irb irc ire iri irn irr iru iu- iub iuc iue iui iur n-i nbb nbc nbe nbi nbn nbr nbu ncb ncc nce nci ncn ncr ncu ne- neb nec nee nei nen ner neu nib nic nie nii nin nir niu nnb nnc nne nni nnn nnu nrb nrc nre nri nrn nrr nru nub nuc nue nui nun nur nuu rbb rbc rbe rbi rbn rbr rbu rcb rcc rce rci rcn rcr rcu re- reb rec ree rei ren rer reu rib ric rie rii rin rir rnb rnc rni rnn rnr rnu rrb rrc rri rrn rrr rru rub ruc rue rui run rur ruu ubb ubc ube ubi ubn ubr ubu ucb ucc uce uci ucn ucr ucu ueb uec uee uei uen uer uib uic uie uii uin uir uiu un- unb unc une uni unn unr unu ur- urb urc ure uri urn urr uru uuc uue uun uur uuu