-er -ic b-u bbb bbc bbd bbe bbf bbi bbr bbu bcb bcc bcd bce bcf bci bcr bcu bdb bdc bdd bde bdf bdi bdr bdu be- beb bec bed bee bef bei ber beu bfb bfc bfd bfe bff bfi bfr bfu bi- bib bic bid bie bif bii bir biu brb brd bre brf bri brr bru bub buc bud bue buf bui bur buu c-- cbb cbc cbd cbe cbf cbi cbr cbu ccb ccc ccd cce ccf cci ccr ccu cdb cdc cdd cde cdf cdi cdr cdu ce- ceb cec ced cee cef cei cer ceu cfb cfc cfd cfe cff cfi cfr cfu ci- cib cic cid cie cif cii cir ciu crb crc crd cre crf cri crr cru cub cuc cud cue cuf cui cur cuu dbb dbc dbd dbe dbf dbi dbr dbu dcb dcc dcd dce dcf dci dcr dcu ddb ddc ddd dde ddf ddi ddr ddu de- deb dec ded dee def dei der deu dfb dfc dfd dfe dff dfi dfr dfu di- dib dic did die dif dii dir diu drb drc drd dre dri drr dru dub duc dud due duf dui dur ebb ebc ebd ebe ebf ebi ebr ebu ec- ecb ecc ecd ece ecf eci ecr ecu ed- edb edc edd ede edf edi edr edu eeb eec eed eee eef eer ef- efb efc efd efe eff efi efr eib eic eid eie eif eii eir eiu erb erc erd ere erf eri err eru eu- eub euc eud eue euf eui eur fbb fbc fbd fbe fbf fbi fbr fbu fcb fcc fcd fce fcf fci fcr fcu fdb fdc fdd fde fdf fdi fdr fdu feb fec fed fee fef fei fer feu ffc ffd ffe fff ffi ffr ffu fib fic fid fie fif fii fir fiu frb frc frd fre frf fri frr fru fub fud fue fuf fui fur fuu i-d i-f ibb ibc ibd ibe ibf ibi ibr ibu icb icc icd ice icf ici icr icu idb idc idd ide idf idi idr idu ie- iec ied iee ief iei ier ifb ifc ifd ife iff ifi ifr ifu iib iic iid iie iif iii iir iiu ir- irb irc ird ire irf iri irr iru iu- iub iuc iud iue iui iur rbb rbc rbd rbe rbf rbi rbr rbu rcb rcc rcd rce rcf rci rcr rcu rdb rdc rdd rde rdf rdi rdr rdu re- reb rec red ree ref rei rer reu rfb rfc rfd rfe rff rfi rfr rfu rib ric rid rie rif rii rir rrb rrc rrd rrf rri rrr rru rub ruc rud rue ruf rui rur ruu ubb ubc ube ubf ubi ubr ubu ucb ucc ucd uce ucf uci ucr ucu udb udc udd ude udf udi udr udu ueb uec ued uee uef uei uer ufc ufd ufe uff ufi ufr ufu uib uic uid uie uif uii uir uiu ur- urb urc urd ure urf uri urr uru uuc uue uur uuu