-er b-u bbb bbe bbk bbo bbr bbt bbu be- beb bee bek beo ber bet beu bev bkb bke bkk bko bkr bkt bkv bob boe bok boo bor bot bou bov brb bre brk bro brr brt bru brv btb bte btk bto btr btt btu btv bub bue buk buo bur but buu bvb bve bvk bvo bvr bvt bvu bvv ebb ebe ebk ebo ebr ebt ebu ebv eeb eee eek eeo eer eet eev ekb eke eko ekr ekt eku ekv eo- eob eoe eok eoo eor eot eou erb ere erk ero err ert eru erv etb ete etk eto etr ett etu etv eu- eub eue eur eut euv evb eve evo evr evt evv k-t kbb kbe kbk kbo kbr kbu ke- keb kee kek keo ker ket kev kkb kke kkk kkr kkt kku kkv kob koe kok koo kor kot kou krk kro krr krt kru krv ktb kte ktk kto ktr ktt ktu ktv kub kue kuk kur kut kuu kvb kvk kvo kvr kvv ob- obb obe obk obo obr obt obu obv oeb oee oeo oer oet okb oke okk oko okr oku oo- oob ook ooo oor oot oov or- orb ore ork oro orr ort oru orv ot- otb ote otk oto otr ott otu otv ou- oue ouk ouo our out ov- ovb ove ovo ovv rbb rbe rbk rbo rbr rbt rbu re- reb ree rek reo rer ret reu rev rkb rke rkk rko rkt rku rkv rob roe rok roo ror rot rou rov rrb rrk rrr rrt rru rtb rte rtk rto rtr rtt rtu rtv rub rue ruk ruo rur rut ruu ruv rvb rve rvo rvr rvt rvu rvv tbb tbe tbk tbo tbr tbt tbu tbv te- teb tee tek teo ter tet teu tev tkb tke tkk tko tkr tkt to- tob toe tok too tor tot tou tov trb tre trk tro trr trt tru trv ttb tte ttk tto ttr ttt ttu ttv tub tue tuk tuo tur tut tuu tuv tvb tve tvk tvo tvr tvt tvu ubb ube ubk ubo ubr ubt ubu ubv ueb uee uer uet ukb uke ukk ukr uku uob uoe uok uoo uor uot ur- urb ure urk uro urr urt uru utb ute utk uto utr utt utu utv uue uur uut uuu uvb uve uvo uvu uvv v-e vbk vbo vbr vbv veb vee vek veo ver vet veu vkb vkt vob voe vok voo vor vot vou vov vrb vre vrk vrr vrt vru vtb vte vtk vto vtr vtt vtu vtv vue vuk vur vut vuv vvb vvo vvr vvt vvv

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