1 <?xml version="1.0"?>
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3 <!ELEMENT billion (#PCDATA)>
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4 <!ENTITY laugh0 "ha">
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5 <!ENTITY laugh1 "&laugh0;&laugh0;">
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6 <!ENTITY laugh2 "&laugh1;&laugh1;">
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7 <!ENTITY laugh3 "&laugh2;&laugh2;">
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8 <!ENTITY laugh4 "&laugh3;&laugh3;">
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9 <!ENTITY laugh5 "&laugh4;&laugh4;">
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10 <!ENTITY laugh6 "&laugh5;&laugh5;">
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11 <!ENTITY laugh7 "&laugh6;&laugh6;">
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12 <!ENTITY laugh8 "&laugh7;&laugh7;">
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13 <!ENTITY laugh9 "&laugh8;&laugh8;">
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14 <!ENTITY laugh10 "&laugh9;&laugh9;">
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16 "&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;">
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18 "&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;">
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20 "&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;">
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22 <billion location="&laugh13;">text</billion>
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