-er -ic b-u bbb bbc bbd bbe bbi bbn bbr bbu bcb bcc bcd bce bci bcn bcr bcu bdb bdc bdd bde bdi bdr bdu be- beb bec bed bee bei ben ber beu bi- bib bic bid bie bii bin bir biu bnb bnc bnd bne bni bnn bnr bnu brb brd bre bri brn brr bru bub buc bud bue bui bun bur buu c-- cbb cbc cbd cbe cbi cbn cbr cbu ccb ccc ccd cce cci ccn ccr ccu cdb cdc cdd cde cdi cdn cdr cdu ce- ceb cec ced cee cei cen cer ceu ci- cib cic cid cie cii cin cir ciu cn- cnb cnc cnd cne cni cnn cnr cnu crb crc crd cre cri crn crr cru cub cuc cud cue cui cun cur cuu dbb dbc dbd dbe dbi dbn dbr dbu dcb dcc dcd dce dci dcn dcr dcu ddb ddc ddd dde ddi ddn ddr ddu de- deb dec ded dee dei den der deu di- dib dic did die dii din dir diu dnb dnc dnd dne dni dnn dnr drb drc drd dre dri drn drr dru dub duc dud due dui dun dur ebb ebc ebd ebe ebi ebn ebr ebu ec- ecb ecc ecd ece eci ecn ecr ecu ed- edb edc edd ede edi edn edr edu eeb eec eed eee een eer eib eic eid eie eii ein eir eiu en- enb enc end ene eni enn enr enu erb erc erd ere eri ern err eru eu- eub euc eud eue eui eun eur i-d ibb ibc ibd ibe ibi ibn ibr ibu icb icc icd ice ici icn icr icu idb idc idd ide idi idn idr idu ie- iec ied iee iei ien ier iib iic iid iie iii iin iir iiu in- inb inc ind ine ini inn inr inu ir- irb irc ird ire iri irn irr iru iu- iub iuc iud iue iui iur n-i nbb nbc nbd nbe nbi nbn nbr nbu ncb ncc ncd nce nci ncn ncr ncu ndb ndc ndd nde ndi ndn ndr ndu ne- neb nec ned nee nei nen ner neu nib nic nid nie nii nin nir niu nnb nnc nne nni nnn nnu nrb nrc nrd nre nri nrn nrr nru nub nuc nud nue nui nun nur nuu rbb rbc rbd rbe rbi rbn rbr rbu rcb rcc rcd rce rci rcn rcr rcu rdb rdc rdd rde rdi rdn rdr rdu re- reb rec red ree rei ren rer reu rib ric rid rie rii rin rir rnb rnc rnd rni rnn rnr rnu rrb rrc rrd rri rrn rrr rru rub ruc rud rue rui run rur ruu ubb ubc ube ubi ubn ubr ubu ucb ucc ucd uce uci ucn ucr ucu udb udc udd ude udi udn udr udu ueb uec ued uee uei uen uer uib uic uid uie uii uin uir uiu un- unb unc und une uni unn unr unu ur- urb urc urd ure uri urn urr uru uuc uue uun uur uuu