-er -ic bbb bbc bbe bbg bbi bbo bbr bcb bcc bce bcg bci bco bcr bcv be- beb bec bee beg bei beo ber bev bgb bgc bge bgg bgi bgo bgr bgv bi- bib bic bie big bii bio bir biv bob boc boe bog boi boo bor bov brb bre brg bri bro brr brv bvb bvc bve bvg bvi bvo bvr bvv c-- cbb cbc cbe cbg cbi cbo cbr cbv ccb ccc cce ccg cci cco ccr ccv ce- ceb cec cee ceg cei ceo cer cev cgb cgc cge cgg cgi cgo cgr cgv ci- cib cic cie cig cii cio cir civ co- cob coc coe cog coi coo cor cov crb crc cre crg cri cro crr crv cvb cvc cve cvg cvi cvo cvr cvv ebb ebc ebe ebg ebi ebo ebr ebv ec- ecb ecc ece ecg eci eco ecr ecv eeb eec eee eeg eeo eer eev egb egc ege egg egi ego egr eib eic eie eig eii eio eir eiv eo- eob eoc eoe eog eoi eoo eor erb erc ere erg eri ero err erv evb evc eve evg evi evo evr evv gbc gbe gbg gbi gbo gbr gbv gcb gcc gce gcg gci gco gcr ge- geb gec gee geg gei geo ger gev ggb ggc ggg ggi ggo ggr ggv gib gic gie gig gii gio gir giv gob goc goe gog goi goo gor gov grb grc gre grg gri gro grr grv gvb gvc gve gvg gvi gvo gvr i-v ibb ibc ibe ibg ibi ibo ibr ibv icb icc ice icg ici ico icr icv ie- iec iee ieg iei ier iev igb igc ige igg igi igo igr iib iic iie iii iio iir io- iob ioc ioe iog ioi ioo ior iov ir- irb irc ire irg iri iro irr irv ivb ivc ive ivg ivi ivo ivr ivv o-i ob- obb obc obe obg obi obo obr obv oc- ocb occ ocg oci oco ocr ocv oeb oec oee oeg oei oeo oer ogc oge ogg ogi ogo oib oic oie oii oio oir oiv oo- oob ooc oog ooi ooo oor oov or- orb orc ore org ori oro orr orv ov- ovb ovc ove ovi ovo ovv rbb rbc rbe rbg rbi rbo rbr rcb rcc rce rcg rci rco rcr rcv re- reb rec ree reg rei reo rer rev rgb rgc rge rgg rgi rgo rgr rgv rib ric rie rig rii rio rir riv rob roc roe rog roi roo ror rov rrb rrc rrg rri rrr rvb rvc rve rvg rvi rvo rvr rvv v-e vbc vbg vbi vbo vbr vbv vcc vce vci vco vcr veb vec vee veg vei veo ver vgc vgg vgo vgr vi- vib vic vie vig vii vio vir viv vob voc voe vog voi voo vor vov vrb vrc vre vrg vri vrr vvb vvc vvg vvi vvo vvr vvv