-er -ic bbb bbc bbd bbe bbg bbi bbo bbr bcb bcc bcd bce bcg bci bco bcr bdb bdc bdd bde bdg bdi bdo bdr be- beb bec bed bee beg bei beo ber bgb bgc bgd bge bgg bgi bgo bgr bi- bib bic bid bie big bii bio bir bob boc bod boe bog boi boo bor brb brd bre brg bri bro brr c-- cbb cbc cbd cbe cbg cbi cbo cbr ccb ccc ccd cce ccg cci cco ccr cdb cdc cdd cde cdg cdi cdo cdr ce- ceb cec ced cee ceg cei ceo cer cgb cgc cgd cge cgg cgi cgo cgr ci- cib cic cid cie cig cii cio cir co- cob coc cod coe cog coi coo cor crb crc crd cre crg cri cro crr dbb dbc dbd dbe dbg dbi dbo dbr dcb dcc dcd dce dcg dci dco dcr ddb ddc ddd dde ddg ddi ddo ddr de- deb dec ded dee deg dei deo der dgc dgd dge dgg dgi dgr di- dib dic did die dig dii dio dir dob doc dod doe dog doi doo dor drb drc drd dre drg dri dro drr ebb ebc ebd ebe ebg ebi ebo ebr ec- ecb ecc ecd ece ecg eci eco ecr ed- edb edc edd ede edg edi edo edr eeb eec eed eee eeg eeo eer egb egc egd ege egg egi ego egr eib eic eid eie eig eii eio eir eo- eob eoc eod eoe eog eoi eoo eor erb erc erd ere erg eri ero err g-d gbc gbd gbe gbg gbi gbo gbr gcb gcc gcd gce gcg gci gco gcr gdb gdc gdd gde gdi gdo gdr ge- geb gec ged gee geg gei geo ger ggb ggc ggd ggg ggi ggo ggr gib gic gid gie gig gii gio gir gob goc god goe gog goi goo gor grb grc grd gre grg gri gro grr i-d ibb ibc ibd ibe ibg ibi ibo ibr icb icc icd ice icg ici ico icr idb idc idd ide idg idi ido idr ie- iec ied iee ieg iei ier igb igc igd ige igg igi igo igr iib iic iid iie iii iio iir io- iob ioc iod ioe iog ioi ioo ior ir- irb irc ird ire irg iri iro irr o-i ob- obb obc obd obe obg obi obo obr oc- ocb occ ocd ocg oci oco ocr odb odc odd ode odg odi odo odr oeb oec oed oee oeg oei oeo oer ogc ogd oge ogg ogi ogo oib oic oid oie oii oio oir oo- oob ooc ood oog ooi ooo oor or- orb orc ord ore org ori oro orr rbb rbc rbd rbe rbg rbi rbo rbr rcb rcc rcd rce rcg rci rco rcr rdb rdc rdd rde rdg rdi rdo rdr re- reb rec red ree reg rei reo rer rgb rgc rgd rge rgg rgi rgo rgr rib ric rid rie rig rii rio rir rob roc rod roe rog roi roo ror rrb rrc rrd rrg rri rrr