function sanitize(s) {
  return s.replaceAll("&", "&")
          .replaceAll("<", "&lt;")
          .replaceAll(">", "&gt;")
          .replaceAll("\n", "<br>");
}

writeln("<table>");
for (x = 1; x <= Right; x++) {
  writeln("<tr><th>" + sanitize([x,1]) + "</th></tr>");
  for (y = 2; y <= Bottom; y++) {
    writeln("<tr><td>" + sanitize([x,y]) + "</td></tr>");
  }
}
writeln("</table>");