<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Figure</title>
<style type="text/css">
@counter-style hexadecimal {
    system: numeric;
    symbols: '0' '1' '2' '3' '4' '5' '6' '7' '8' '9' 'A' 'B' 'C' 'D' 'E' 'F';
}
@counter-style hexpad {
    system: extends hexadecimal;
    pad: 2 "0";
}
@counter-style hexcolon {
    system: extends hexadecimal;
    suffix: ": ";
}
@counter-style hexcolonlimited {
    system: extends hexcolon;
    range: 1 255; /* stops at FF */
}

ol {margin-left: 4em; pad