1<!ELEMENT billion (#PCDATA)> 2<!ENTITY % laugh0 "<!-- Ha ! -->"> 3<!ENTITY % laugh1 "%laugh0;%laugh0;"> 4<!ENTITY % laugh2 "%laugh1;%laugh1;"> 5<!ENTITY % laugh3 "%laugh2;%laugh2;"> 6<!ENTITY % laugh4 "%laugh3;%laugh3;"> 7<!ENTITY % laugh5 "%laugh4;%laugh4;"> 8<!ENTITY % laugh6 "%laugh5;%laugh5;"> 9<!ENTITY % laugh7 "%laugh6;%laugh6;"> 10<!ENTITY % laugh8 "%laugh7;%laugh7;"> 11<!ENTITY % laugh9 "%laugh8;%laugh8;"> 12<!ENTITY % laugh10 "%laugh9;%laugh9;"> 13<!ENTITY % laugh11 14"%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;%laugh10;"> 15<!ENTITY % laugh12 16"%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;%laugh11;"> 17<!ENTITY % laugh13 18"%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;%laugh12;"> 19%laugh13; 20 21