-er -ic bbb bbc bbd bbe bbg bbi bbr bcb bcc bcd bce bcg bci bcr bdb bdc bdd bde bdg bdi bdr be- beb bec bed bee beg bei ber bgb bgc bgd bge bgg bgi bgr bi- bib bic bid bie big bii bir brb brd bre brg bri brr c-- cbb cbc cbd cbe cbg cbi cbr ccb ccc ccd cce ccg cci ccr cdb cdc cdd cde cdg cdi cdr ce- ceb cec ced cee ceg cei cer cgb cgc cgd cge cgg cgi cgr ci- cib cic cid cie cig cii cir crb crc crd cre crg cri crr dbb dbc dbd dbe dbg dbi dbr dcb dcc dcd dce dcg dci dcr ddb ddc ddd dde ddg ddi ddr de- deb dec ded dee deg dei der dgc dgd dge dgg dgi dgr di- dib dic did die dig dii dir drb drc drd dre drg dri drr ebb ebc ebd ebe ebg ebi ebr ec- ecb ecc ecd ece ecg eci ecr ed- edb edc edd ede edg edi edr eeb eec eed eee eeg eer egb egc egd ege egg egi egr eib eic eid eie eig eii eir erb erc erd ere erg eri err g-d gbc gbd gbe gbg gbi gbr gcb gcc gcd gce gcg gci gcr gdb gdc gdd gde gdi gdr ge- geb gec ged gee geg gei ger ggb ggc ggd ggg ggi ggr gib gic gid gie gig gii gir grb grc grd gre grg gri grr i-d ibb ibc ibd ibe ibg ibi ibr icb icc icd ice icg ici icr idb idc idd ide idg idi idr ie- iec ied iee ieg iei ier igb igc igd ige igg igi igr iib iic iid iie iii iir ir- irb irc ird ire irg iri irr rbb rbc rbd rbe rbg rbi rbr rcb rcc rcd rce rcg rci rcr rdb rdc rdd rde rdg rdi rdr re- reb rec red ree reg rei rer rgb rgc rgd rge rgg rgi rgr rib ric rid rie rig rii rir rrb rrc rrd rrg rri rrr