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