-ly b-u bbb bbl bbn bbt bbu bby blb bll bln blt blu bly bnb bnl bnn bnt bnu btb btl btn btt btu bty bub bul bun but buu buy by- byl byn byt byu lbb lbl lbt lbu llb lll lln llt llu lly lnb lnl lnn lnt lnu ltb ltl ltt ltu lub lul lun lut luu luy lyl lyn lyt nbb nbl nbn nbt nbu nlb nll nln nlt nlu nly nnb nnl nnn nnt nnu ntb ntn ntt ntu nub nul nun nut nuu nuy nyl nyn nyt nyu nyy tbb tbl tbn tbt tbu tll tln tlt tlu tnb tnl tnn tnt ttb ttl ttn ttt ttu tty tub tul tun tut tuu tuy tyl tyn tyt ubb ubl ubn ubt ubu uby ulb ull uln ult ulu uly un- unb unl unn unt unu uny utb utl utn utt utu uty uun uut uuu uyu ybl yby yll ylt yly ynn ynu yny ytl ytn ytt ytu yul yun yut yuu yuy yyb yyt yyu yyy