b-u bbb bbe bbf bbl bbt bbu bbx be- beb bee bef bel bet beu bex bfb bfe bff bfl bft bfu bfx blb ble blf bll blt blu blx btb bte btf btl btt btu btx bub bue buf bul but buu bux bxb bxl bxx ebb ebe ebf ebl ebt ebu ebx eeb eee eef eel eet eex ef- efb efe eff efl eft efx elb ele elf ell elt elu elx etb ete etf etl ett etu etx eu- eub eue euf eul eut eux ex- exe exl ext exu exx fbb fbe fbf fbl fbt fbu fbx feb fee fef fel fet feu fex ffe fff ffl fft ffu ffx flb fle flf fll flt flu flx ftb fte ftf ftl ftt ftu ftx fub fue fuf ful fut fuu fux fxe fxt fxu fxx lbb lbe lbf lbl lbt lbu lbx leb lee lef lel let leu lex lfb lfe lff lfl lft lfu lfx llb lle llf lll llt llu ltb lte ltf ltl ltt ltu ltx lub lue luf lul lut luu lux lxx t-x tbb tbe tbf tbl tbt tbu te- teb tee tef tel tet teu tex tfb tfe tff tfl tft tfu tfx tle tlf tll tlt tlu tlx ttb tte ttf ttl ttt ttu ttx tub tue tuf tul tut tuu tux txe txf txl txt txu ubb ube ubf ubl ubt ubu ubx ueb uee uef uel uet ufe uff ufl uft ufu ufx ulb ule ulf ull ult ulu utb ute utf utl utt utu utx uue uut uuu uxb uxf uxt uxu xbe xbl xbx xee xel xet xeu xex xfe xfl xft xfx xlb xlf xlt xtf xtx xue xul xxl xxx