-er -ic bbb bbc bbe bbg bbi bbo bbr bbt bcb bcc bce bcg bci bco bcr bct bcv be- beb bec bee beg bei beo ber bet bev bgb bgc bge bgg bgi bgo bgr bgt bgv bi- bib bic bie big bii bio bir bit biv bob boc boe bog boi boo bor bot bov brb bre brg bri bro brr brt brv btb btc bte btg bti bto btr btt btv bvb bvc bve bvg bvi bvo bvr bvt bvv c-- cbb cbc cbe cbg cbi cbo cbr cbt cbv ccb ccc cce ccg cci cco ccr cct ccv ce- ceb cec cee ceg cei ceo cer cet cev cgb cgc cge cgg cgi cgo cgr cgt cgv ci- cib cic cie cig cii cio cir cit civ co- cob coc coe cog coi coo cor cot cov crb crc cre crg cri cro crr crt crv ctb ctc cte ctg cti cto ctr ctt ctv cvb cvc cve cvg cvi cvo cvr cvt cvv ebb ebc ebe ebg ebi ebo ebr ebt ebv ec- ecb ecc ece ecg eci eco ecr ect ecv eeb eec eee eeg eeo eer eet eev egb egc ege egg egi ego egr egt eib eic eie eig eii eio eir eit eiv eo- eob eoc eoe eog eoi eoo eor eot erb erc ere erg eri ero err ert erv etb etc ete etg eti eto etr ett etv evb evc eve evg evi evo evr evt evv gbc gbe gbg gbi gbo gbr gbt gbv gcb gcc gce gcg gci gco gcr gct ge- geb gec gee geg gei geo ger get gev ggb ggc ggg ggi ggo ggr ggt ggv gib gic gie gig gii gio gir git giv gob goc goe gog goi goo gor got gov grb grc gre grg gri gro grr grt grv gtb gtc gte gtg gti gto gtr gtt gtv gvb gvc gve gvg gvi gvo gvr gvt i-v ibb ibc ibe ibg ibi ibo ibr ibt ibv icb icc ice icg ici ico icr ict icv ie- iec iee ieg iei ier iet iev igb igc ige igg igi igo igr igt iib iic iie iii iio iir iit io- iob ioc ioe iog ioi ioo ior iot iov ir- irb irc ire irg iri iro irr irt irv itb itc ite itg iti ito itt itv ivb ivc ive ivg ivi ivo ivr ivt ivv o-i ob- obb obc obe obg obi obo obr obt obv oc- ocb occ ocg oci oco ocr oct ocv oeb oec oee oeg oei oeo oer oet ogc oge ogg ogi ogo ogt oib oic oie oii oio oir oit oiv oo- oob ooc oog ooi ooo oor oot oov or- orb orc ore org ori oro orr ort orv ot- otb otc ote otg oti oto otr ott otv ov- ovb ovc ove ovi ovo ovv rbb rbc rbe rbg rbi rbo rbr rbt rcb rcc rce rcg rci rco rcr rct rcv re- reb rec ree reg rei reo rer ret rev rgb rgc rge rgg rgi rgo rgr rgt rgv rib ric rie rig rii rio rir rit riv rob roc roe rog roi roo ror rot rov rrb rrc rrg rri rrr rrt rtb rtc rte rtg rti rto rtr rtt rtv rvb rvc rve rvg rvi rvo rvr rvt rvv tbb tbc tbe tbg tbi tbo tbr tbt tbv tcb tcc tce tcg tci tco tcr tct tcv te- teb tec tee teg tei teo ter tet tev tgb tgc tge tgg tgi tgo tgr tgt tgv tib tic tie tig tii tio tir tit tiv to- tob toc toe tog toi too tor tot tov trb trc tre trg tri tro trr trt trv ttb ttc tte ttg tti tto ttr ttt ttv tvb tvc tve tvg tvi tvo tvr tvt v-e vbc vbg vbi vbo vbr vbv vcc vce vci vco vcr vct veb vec vee veg vei veo ver vet vgc vgg vgo vgr vgt vi- vib vic vie vig vii vio vir vit viv vob voc voe vog voi voo vor vot vov vrb vrc vre vrg vri vrr vrt vtb vtc vte vtg vti vto vtr vtt vtv vvb vvc vvg vvi vvo vvr vvt vvv