-ly b-u bbb bbf bbi bbl bbt bbu bbx bby bfb bff bfi bfl bft bfu bfx bfy bi- bib bif bii bil bit biu bix biy blb blf bli bll blt blu blx bly btb btf bti btl btt btu btx bty bub buf bui bul but buu bux buy bxb bxi bxl bxx by- byf byi byl byt byu fbb fbf fbi fbl fbt fbu fbx fff ffi ffl fft ffu ffx ffy fib fif fii fil fit fiu fix flb flf fli fll flt flu flx fly ftb ftf fti ftl ftt ftu ftx fty fub fuf fui ful fut fuu fux fxi fxt fxu fxx fy- fyb fyi i-f ibb ibf ibi ibl ibt ibu ibx iby ifb iff ifi ifl ift ifu ifx ify iib iif iii iil iit iiu iix il- ilb ilf ili ill ilt ilu ilx ily itb itf iti itl itt itu itx ity iu- iub iui iut ixi ixl ixy iyt iyy lbb lbf lbi lbl lbt lbu lbx lfb lff lfi lfl lft lfu lfx lib lif lii lil lit liu lix llb llf lli lll llt llu lly ltb ltf lti ltl ltt ltu ltx lub luf lui lul lut luu lux luy lxi lxx lyf lyl lyt lyx t-x tbb tbf tbi tbl tbt tbu tfb tff tfi tfl tft tfu tfx tib tif tii til tit tiu tix tiy tlf tli tll tlt tlu tlx ttb ttf tti ttl ttt ttu ttx tty tub tuf tui tul tut tuu tux tuy txf txi txl txt txu tyf tyl tyt ubb ubf ubi ubl ubt ubu ubx uby uff ufi ufl uft ufu ufx uib uif uii uil uit uiu ulb ulf uli ull ult ulu uly utb utf uti utl utt utu utx uty uut uuu uxb uxf uxt uxu uyi uyu xbl xbx xfl xft xfx xii xit xiu xix xlb xlf xli xlt xtf xti xtx xty xui xul xxi xxl xxx xxy xyl xyy ybf ybi ybl yby yff yft yfu yif yii yit yli yll ylt yly ytf ytl ytt ytu yui yul yut yuu yux yuy yxy yyb yyf yyt yyu yyy