-er -ic bbb bbc bbd bbe bbi bbn bbr bbt bcb bcc bcd bce bci bcn bcr bct bdb bdc bdd bde bdi bdr bdt be- beb bec bed bee bei ben ber bet bi- bib bic bid bie bii bin bir bit bnb bnc bnd bne bni bnn bnr bnt brb brd bre bri brn brr brt btb btc btd bte bti btn btr btt c-- cbb cbc cbd cbe cbi cbn cbr cbt ccb ccc ccd cce cci ccn ccr cct cdb cdc cdd cde cdi cdn cdr cdt ce- ceb cec ced cee cei cen cer cet ci- cib cic cid cie cii cin cir cit cn- cnb cnc cnd cne cni cnn cnr cnt crb crc crd cre cri crn crr crt ctb ctc ctd cte cti ctn ctr ctt dbb dbc dbd dbe dbi dbn dbr dbt dcb dcc dcd dce dci dcn dcr dct ddb ddc ddd dde ddi ddn ddr ddt de- deb dec ded dee dei den der det di- dib dic did die dii din dir dit dnb dnc dnd dne dni dnn dnr dnt drb drc drd dre dri drn drr drt dtb dtc dtd dte dti dtn dtr dtt ebb ebc ebd ebe ebi ebn ebr ebt ec- ecb ecc ecd ece eci ecn ecr ect ed- edb edc edd ede edi edn edr edt eeb eec eed eee een eer eet eib eic eid eie eii ein eir eit en- enb enc end ene eni enn enr ent erb erc erd ere eri ern err ert etb etc etd ete eti etn etr ett i-d ibb ibc ibd ibe ibi ibn ibr ibt icb icc icd ice ici icn icr ict idb idc idd ide idi idn idr idt ie- iec ied iee iei ien ier iet iib iic iid iie iii iin iir iit in- inb inc ind ine ini inn inr int ir- irb irc ird ire iri irn irr irt itb itc itd ite iti itn itt n-i nbb nbc nbd nbe nbi nbn nbr nbt ncb ncc ncd nce nci ncn ncr nct ndb ndc ndd nde ndi ndn ndr ndt ne- neb nec ned nee nei nen ner net nib nic nid nie nii nin nir nit nnb nnc nne nni nnn nnt nrb nrc nrd nre nri nrn nrr nrt ntb ntc ntd nte nti ntn ntr ntt rbb rbc rbd rbe rbi rbn rbr rbt rcb rcc rcd rce rci rcn rcr rct rdb rdc rdd rde rdi rdn rdr rdt re- reb rec red ree rei ren rer ret rib ric rid rie rii rin rir rit rnb rnc rnd rni rnn rnr rnt rrb rrc rrd rri rrn rrr rrt rtb rtc rtd rte rti rtn rtr rtt tbb tbc tbd tbe tbi tbn tbr tbt tcb tcc tcd tce tci tcn tcr tct tdb tdc tdd tde tdi tdn tdr tdt te- teb tec ted tee tei ten ter tet tib tic tid tie tii tin tir tit tnb tnc tnd tne tni tnn tnr tnt trb trc trd tre tri trn trr trt ttb ttc ttd tte tti ttn ttr ttt