-er b-u bbb bbe bbf bbl bbr bbt bbu be- beb bee bef bel ber bet beu bfb bfe bff bfl bfr bft bfu blb ble blf bll blr blt blu brb bre brf brl brr brt bru btb bte btf btl btr btt btu bub bue buf bul bur but buu ebb ebe ebf ebl ebr ebt ebu eeb eee eef eel eer eet ef- efb efe eff efl efr eft elb ele elf ell elr elt elu erb ere erf erl err ert eru etb ete etf etl etr ett etu eu- eub eue euf eul eur eut fbb fbe fbf fbl fbr fbt fbu feb fee fef fel fer fet feu ffe fff ffl ffr fft ffu flb fle flf fll flr flt flu frb fre frf frl frr frt fru ftb fte ftf ftl ftr ftt ftu fub fue fuf ful fur fut fuu lbb lbe lbf lbl lbr lbt lbu leb lee lef lel ler let leu lfb lfe lff lfl lfr lft lfu llb lle llf lll llr llt llu lrb lrf lrr lrt lru ltb lte ltf ltl ltr ltt ltu lub lue luf lul lur lut luu rbb rbe rbf rbl rbr rbt rbu re- reb ree ref rel rer ret reu rfb rfe rff rfl rfr rft rfu rle rlf rll rlr rlt rlu rrb rrf rrl rrr rrt rru rtb rte rtf rtl rtr rtt rtu rub rue ruf rur rut ruu tbb tbe tbf tbl tbr tbt tbu te- teb tee tef tel ter tet teu tfb tfe tff tfl tfr tft tfu tle tlf tll tlr tlt tlu trb tre trf trl trr trt tru ttb tte ttf ttl ttr ttt ttu tub tue tuf tul tur tut tuu ubb ube ubf ubl ubr ubt ubu ueb uee uef uel uer uet ufe uff ufl ufr uft ufu ulb ule ulf ull ulr ult ulu ur- urb ure urf url urr urt uru utb ute utf utl utr utt utu uue uur uut uuu