-er b-u bbb bbe bbn bbo bbr bbt bbu be- beb bee ben beo ber bet beu bev bnb bne bnn bno bnr bnt bnu bnv bob boe bon boo bor bot bou bov brb bre brn bro brr brt bru brv btb bte btn bto btr btt btu btv bub bue bun buo bur but buu bvb bve bvn bvo bvr bvt bvu bvv ebb ebe ebn ebo ebr ebt ebu ebv eeb eee een eeo eer eet eev en- enb ene enn eno enr ent enu env eo- eob eoe eon eoo eor eot eou erb ere ern ero err ert eru erv etb ete etn eto etr ett etu etv eu- eub eue eun eur eut euv evb eve evn evo evr evt evv nbb nbe nbn nbo nbr nbt nbu nbv ne- neb nee nen neo ner net neu nev nnb nne nnn nno nnt nnu nnv no- nob noe non noo nor not nou nov nrb nre nrn nro nrr nrt nru nrv ntb nte ntn nto ntr ntt ntu ntv nub nue nun nuo nur nut nuu nuv nvb nve nvn nvt nvu nvv ob- obb obe obn obo obr obt obu obv oeb oee oen oeo oer oet on- onb one onn ono onr ont onu oo- oob oon ooo oor oot oov or- orb ore orn oro orr ort oru orv ot- otb ote otn oto otr ott otu otv ou- oue oun ouo our out ov- ovb ove ovo ovv rbb rbe rbn rbo rbr rbt rbu re- reb ree ren reo rer ret reu rev rnb rnn rno rnr rnt rnu rnv rob roe ron roo ror rot rou rov rrb rrn rrr rrt rru rtb rte rtn rto rtr rtt rtu rtv rub rue run ruo rur rut ruu ruv rvb rve rvn rvo rvr rvt rvu rvv tbb tbe tbn tbo tbr tbt tbu tbv te- teb tee ten teo ter tet teu tev tnb tne tnn tno tnr tnt to- tob toe ton too tor tot tou tov trb tre trn tro trr trt tru trv ttb tte ttn tto ttr ttt ttu ttv tub tue tun tuo tur tut tuu tuv tvb tve tvn tvo tvr tvt tvu ubb ube ubn ubo ubr ubt ubu ubv ueb uee uen uer uet un- unb une unn uno unr unt unu unv uob uoe uon uoo uor uot ur- urb ure urn uro urr urt uru utb ute utn uto utr utt utu utv uue uun uur uut uuu uvb uve uvo uvu uvv v-e vbo vbr vbv veb vee ven veo ver vet veu vn- vno vnr vnu vnv vob voe von voo vor vot vou vov vrb vre vrn vrr vrt vru vtb vte vto vtr vtt vtu vtv vue vur vut vuv vvb vvo vvr vvt vvv