-er -ic bbb bbc bbd bbe bbi bbo bbr bcb bcc bcd bce bci bco bcr bcv bdb bdc bdd bde bdi bdo bdr bdv be- beb bec bed bee bei beo ber bev bi- bib bic bid bie bii bio bir biv bob boc bod boe boi boo bor bov brb brd bre bri bro brr brv bvb bvc bvd bve bvi bvo bvr bvv c-- cbb cbc cbd cbe cbi cbo cbr cbv ccb ccc ccd cce cci cco ccr ccv cdb cdc cdd cde cdi cdo cdr cdv ce- ceb cec ced cee cei ceo cer cev ci- cib cic cid cie cii cio cir civ co- cob coc cod coe coi coo cor cov crb crc crd cre cri cro crr crv cvb cvc cvd cve cvi cvo cvr cvv dbb dbc dbd dbe dbi dbo dbr dbv dcb dcc dcd dce dci dco dcr dcv ddb ddc ddd dde ddi ddo ddr de- deb dec ded dee dei deo der dev di- dib dic did die dii dio dir div dob doc dod doe doi doo dor dov drb drc drd dre dri dro drr drv dvb dvc dvd dve dvi dvr ebb ebc ebd ebe ebi ebo ebr ebv ec- ecb ecc ecd ece eci eco ecr ecv ed- edb edc edd ede edi edo edr eeb eec eed eee eeo eer eev eib eic eid eie eii eio eir eiv eo- eob eoc eod eoe eoi eoo eor erb erc erd ere eri ero err erv evb evc evd eve evi evo evr evv i-d i-v ibb ibc ibd ibe ibi ibo ibr ibv icb icc icd ice ici ico icr icv idb idc idd ide idi ido idr idv ie- iec ied iee iei ier iev iib iic iid iie iii iio iir io- iob ioc iod ioe ioi ioo ior iov ir- irb irc ird ire iri iro irr irv ivb ivc ivd ive ivi ivo ivr ivv o-i ob- obb obc obd obe obi obo obr obv oc- ocb occ ocd oci oco ocr ocv odb odc odd ode odi odo odr odv oeb oec oed oee oei oeo oer oib oic oid oie oii oio oir oiv oo- oob ooc ood ooi ooo oor oov or- orb orc ord ore ori oro orr orv ov- ovb ovc ovd ove ovi ovo ovv rbb rbc rbd rbe rbi rbo rbr rcb rcc rcd rce rci rco rcr rcv rdb rdc rdd rde rdi rdo rdr rdv re- reb rec red ree rei reo rer rev rib ric rid rie rii rio rir riv rob roc rod roe roi roo ror rov rrb rrc rrd rri rrr rvb rvc rvd rve rvi rvo rvr rvv v-e vbc vbd vbi vbo vbr vbv vcc vcd vce vci vco vcr vdb vdc vdd vde vdi vdo vdr vdv veb vec ved vee vei veo ver vi- vib vic vid vie vii vio vir viv vob voc vod voe voi voo vor vov vrb vrc vrd vre vri vrr vvb vvc vvi vvo vvr vvv