1<!ELEMENT billion (#PCDATA)> 2<!ENTITY % p0 "<!---->"> 3<!ENTITY % p1 "%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;%p0;"> 4<!ENTITY % p2 "%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;%p1;"> 5<!ENTITY % p3 "%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;%p2;"> 6<!ENTITY % p4 "%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;%p3;"> 7<!ENTITY % p5 "%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;%p4;"> 8<!ENTITY % p6 "%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;%p5;"> 9%p5; 10