-er -ic bbb bbc bbd bbe bbi bbo bbr bbt bcb bcc bcd bce bci bco bcr bct bdb bdc bdd bde bdi bdo bdr bdt be- beb bec bed bee bei beo ber bet bi- bib bic bid bie bii bio bir bit bob boc bod boe boi boo bor bot brb brd bre bri bro brr brt btb btc btd bte bti bto btr btt c-- cbb cbc cbd cbe cbi cbo cbr cbt ccb ccc ccd cce cci cco ccr cct cdb cdc cdd cde cdi cdo cdr cdt ce- ceb cec ced cee cei ceo cer cet ci- cib cic cid cie cii cio cir cit co- cob coc cod coe coi coo cor cot crb crc crd cre cri cro crr crt ctb ctc ctd cte cti cto ctr ctt dbb dbc dbd dbe dbi dbo dbr dbt dcb dcc dcd dce dci dco dcr dct ddb ddc ddd dde ddi ddo ddr ddt de- deb dec ded dee dei deo der det di- dib dic did die dii dio dir dit dob doc dod doe doi doo dor dot drb drc drd dre dri dro drr drt dtb dtc dtd dte dti dto dtr dtt ebb ebc ebd ebe ebi ebo ebr ebt ec- ecb ecc ecd ece eci eco ecr ect ed- edb edc edd ede edi edo edr edt eeb eec eed eee eeo eer eet eib eic eid eie eii eio eir eit eo- eob eoc eod eoe eoi eoo eor eot erb erc erd ere eri ero err ert etb etc etd ete eti eto etr ett i-d ibb ibc ibd ibe ibi ibo ibr ibt icb icc icd ice ici ico icr ict idb idc idd ide idi ido idr idt ie- iec ied iee iei ier iet iib iic iid iie iii iio iir iit io- iob ioc iod ioe ioi ioo ior iot ir- irb irc ird ire iri iro irr irt itb itc itd ite iti ito itt o-i ob- obb obc obd obe obi obo obr obt oc- ocb occ ocd oci oco ocr oct odb odc odd ode odi odo odr odt oeb oec oed oee oei oeo oer oet oib oic oid oie oii oio oir oit oo- oob ooc ood ooi ooo oor oot or- orb orc ord ore ori oro orr ort ot- otb otc otd ote oti oto otr ott rbb rbc rbd rbe rbi rbo rbr rbt rcb rcc rcd rce rci rco rcr rct rdb rdc rdd rde rdi rdo rdr rdt re- reb rec red ree rei reo rer ret rib ric rid rie rii rio rir rit rob roc rod roe roi roo ror rot rrb rrc rrd rri rrr rrt rtb rtc rtd rte rti rto rtr rtt tbb tbc tbd tbe tbi tbo tbr tbt tcb tcc tcd tce tci tco tcr tct tdb tdc tdd tde tdi tdo tdr tdt te- teb tec ted tee tei teo ter tet tib tic tid tie tii tio tir tit to- tob toc tod toe toi too tor tot trb trc trd tre tri tro trr trt ttb ttc ttd tte tti tto ttr ttt