bbb bbe bbl bbn bbt be- beb bee bel ben bet bez blb ble bll bln blt blz bnb bne bnl bnn bnt bnz btb bte btl btn btt btz bze bzn bzz ebb ebe ebl ebn ebt eeb eee eel een eet elb ele ell eln elt elz en- enb ene enl enn ent enz etb ete etl etn ett etz eze ezz lbb lbe lbl lbt leb lee lel len let lez llb lle lll lln llt llz lnb lne lnl lnn lnt ltb lte ltl ltt ltz nbb nbe nbl nbn nbt ne- neb nee nel nen net nez nlb nle nll nln nlt nlz nnb nne nnl nnn nnt nnz ntb nte ntn ntt ntz nzb nze nzz tbb tbe tbl tbn tbt tbz te- teb tee tel ten tet tez tle tll tln tlt tlz tnb tne tnl tnn tnt tnz ttb tte ttl ttn ttt tze zbb zbl zbt zeb zee zel zen zet zez zlt zne znn zte ztl zzt zzz