-er -ic bbb bbc bbd bbe bbi bbr bbt bcb bcc bcd bce bci bcr bct bdb bdc bdd bde bdi bdr bdt be- beb bec bed bee bei ber bet bi- bib bic bid bie bii bir bit brb brd bre bri brr brt btb btc btd bte bti btr btt c-- cbb cbc cbd cbe cbi cbr cbt ccb ccc ccd cce cci ccr cct cdb cdc cdd cde cdi cdr cdt ce- ceb cec ced cee cei cer cet ci- cib cic cid cie cii cir cit crb crc crd cre cri crr crt ctb ctc ctd cte cti ctr ctt dbb dbc dbd dbe dbi dbr dbt dcb dcc dcd dce dci dcr dct ddb ddc ddd dde ddi ddr ddt de- deb dec ded dee dei der det di- dib dic did die dii dir dit drb drc drd dre dri drr drt dtb dtc dtd dte dti dtr dtt ebb ebc ebd ebe ebi ebr ebt ec- ecb ecc ecd ece eci ecr ect ed- edb edc edd ede edi edr edt eeb eec eed eee eer eet eib eic eid eie eii eir eit erb erc erd ere eri err ert etb etc etd ete eti etr ett i-d ibb ibc ibd ibe ibi ibr ibt icb icc icd ice ici icr ict idb idc idd ide idi idr idt ie- iec ied iee iei ier iet iib iic iid iie iii iir iit ir- irb irc ird ire iri irr irt itb itc itd ite iti itt rbb rbc rbd rbe rbi rbr rbt rcb rcc rcd rce rci rcr rct rdb rdc rdd rde rdi rdr rdt re- reb rec red ree rei rer ret rib ric rid rie rii rir rit rrb rrc rrd rri rrr rrt rtb rtc rtd rte rti rtr rtt tbb tbc tbd tbe tbi tbr tbt tcb tcc tcd tce tci tcr tct tdb tdc tdd tde tdi tdr tdt te- teb tec ted tee tei ter tet tib tic tid tie tii tir tit trb trc trd tre tri trr trt ttb ttc ttd tte tti ttr ttt