-er -ic bbb bbc bbd bbe bbi bbo bbr bcb bcc bcd bce bci bco bcr bdb bdc bdd bde bdi bdo bdr be- beb bec bed bee bei beo ber bi- bib bic bid bie bii bio bir bob boc bod boe boi boo bor brb brd bre bri bro brr c-- cbb cbc cbd cbe cbi cbo cbr ccb ccc ccd cce cci cco ccr cdb cdc cdd cde cdi cdo cdr ce- ceb cec ced cee cei ceo cer ci- cib cic cid cie cii cio cir co- cob coc cod coe coi coo cor crb crc crd cre cri cro crr dbb dbc dbd dbe dbi dbo dbr dcb dcc dcd dce dci dco dcr ddb ddc ddd dde ddi ddo ddr de- deb dec ded dee dei deo der di- dib dic did die dii dio dir dob doc dod doe doi doo dor drb drc drd dre dri dro drr ebb ebc ebd ebe ebi ebo ebr ec- ecb ecc ecd ece eci eco ecr ed- edb edc edd ede edi edo edr eeb eec eed eee eeo eer eib eic eid eie eii eio eir eo- eob eoc eod eoe eoi eoo eor erb erc erd ere eri ero err i-d ibb ibc ibd ibe ibi ibo ibr icb icc icd ice ici ico icr idb idc idd ide idi ido idr ie- iec ied iee iei ier iib iic iid iie iii iio iir io- iob ioc iod ioe ioi ioo ior ir- irb irc ird ire iri iro irr o-i ob- obb obc obd obe obi obo obr oc- ocb occ ocd oci oco ocr odb odc odd ode odi odo odr oeb oec oed oee oei oeo oer oib oic oid oie oii oio oir oo- oob ooc ood ooi ooo oor or- orb orc ord ore ori oro orr rbb rbc rbd rbe rbi rbo rbr rcb rcc rcd rce rci rco rcr rdb rdc rdd rde rdi rdo rdr re- reb rec red ree rei reo rer rib ric rid rie rii rio rir rob roc rod roe roi roo ror rrb rrc rrd rri rrr