-er bbb bbd bbe bbg bbo bbr bdb bdd bde bdg bdo bdr bdv be- beb bed bee beg beo ber bev bgb bgd bge bgg bgo bgr bgv bob bod boe bog boo bor bov brb brd bre brg bro brr brv bvb bvd bve bvg bvo bvr bvv dbb dbd dbe dbg dbo dbr dbv ddb ddd dde ddg ddo ddr de- deb ded dee deg deo der dev dgd dge dgg dgr dob dod doe dog doo dor dov drb drd dre drg dro drr drv dvb dvd dve dvg dvr ebb ebd ebe ebg ebo ebr ebv ed- edb edd ede edg edo edr eeb eed eee eeg eeo eer eev egb egd ege egg ego egr eo- eob eod eoe eog eoo eor erb erd ere erg ero err erv evb evd eve evg evo evr evv g-d gbd gbe gbg gbo gbr gbv gdb gdd gde gdo gdr gdv ge- geb ged gee geg geo ger gev ggb ggd ggg ggo ggr ggv gob god goe gog goo gor gov grb grd gre grg gro grr grv gvb gvd gve gvg gvo gvr ob- obb obd obe obg obo obr obv odb odd ode odg odo odr odv oeb oed oee oeg oeo oer ogd oge ogg ogo oo- oob ood oog ooo oor oov or- orb ord ore org oro orr orv ov- ovb ovd ove ovo ovv rbb rbd rbe rbg rbo rbr rdb rdd rde rdg rdo rdr rdv re- reb red ree reg reo rer rev rgb rgd rge rgg rgo rgr rgv rob rod roe rog roo ror rov rrb rrd rrg rrr rvb rvd rve rvg rvo rvr rvv v-e vbd vbg vbo vbr vbv vdb vdd vde vdg vdo vdr vdv veb ved vee veg veo ver vgg vgo vgr vob vod voe vog voo vor vov vrb vrd vre vrg vrr vvb vvg vvo vvr vvv