-er -ic b-u bbb bbc bbe bbi bbr bbt bbu bcb bcc bce bci bcr bct bcu bcv be- beb bec bee bei ber bet beu bev bi- bib bic bie bii bir bit biu biv brb bre bri brr brt bru brv btb btc bte bti btr btt btu btv bub buc bue bui bur but buu bvb bvc bve bvi bvr bvt bvu bvv c-- cbb cbc cbe cbi cbr cbt cbu cbv ccb ccc cce cci ccr cct ccu ccv ce- ceb cec cee cei cer cet ceu cev ci- cib cic cie cii cir cit ciu civ crb crc cre cri crr crt cru crv ctb ctc cte cti ctr ctt ctu ctv cub cuc cue cui cur cut cuu cuv cvb cvc cve cvi cvr cvt cvu cvv ebb ebc ebe ebi ebr ebt ebu ebv ec- ecb ecc ece eci ecr ect ecu ecv eeb eec eee eer eet eev eib eic eie eii eir eit eiu eiv erb erc ere eri err ert eru erv etb etc ete eti etr ett etu etv eu- eub euc eue eui eur eut euv evb evc eve evi evr evt evv i-v ibb ibc ibe ibi ibr ibt ibu ibv icb icc ice ici icr ict icu icv ie- iec iee iei ier iet iev iib iic iie iii iir iit iiu ir- irb irc ire iri irr irt iru irv itb itc ite iti itt itu itv iu- iub iuc iue iui iur iut ivb ivc ive ivi ivr ivt ivu ivv rbb rbc rbe rbi rbr rbt rbu rcb rcc rce rci rcr rct rcu rcv re- reb rec ree rei rer ret reu rev rib ric rie rii rir rit riv rrb rrc rri rrr rrt rru rtb rtc rte rti rtr rtt rtu rtv rub ruc rue rui rur rut ruu ruv rvb rvc rve rvi rvr rvt rvu rvv tbb tbc tbe tbi tbr tbt tbu tbv tcb tcc tce tci tcr tct tcu tcv te- teb tec tee tei ter tet teu tev tib tic tie tii tir tit tiu tiv trb trc tre tri trr trt tru trv ttb ttc tte tti ttr ttt ttu ttv tub tuc tue tui tur tut tuu tuv tvb tvc tve tvi tvr tvt tvu ubb ubc ube ubi ubr ubt ubu ubv ucb ucc uce uci ucr uct ucu ucv ueb uec uee uei uer uet uib uic uie uii uir uit uiu ur- urb urc ure uri urr urt uru utb utc ute uti utr utt utu utv uuc uue uur uut uuu uvb uvc uve uvu uvv v-e vbc vbi vbr vbv vcc vce vci vcr vct vcu veb vec vee vei ver vet veu vi- vib vic vie vii vir vit viu viv vrb vrc vre vri vrr vrt vru vtb vtc vte vti vtr vtt vtu vtv vue vur vut vuv vvb vvc vvi vvr vvt vvv