1<?xml version="1.0"?>
2<doc>
3 <a>1</a>
4 <a>2<a>under2</a>2.5</a>
5 <b>3<a>under3</a>3.5</b>
6 <b>4<c>under4</c>4.5<a>under4.5</a>4.9</b>
7 <b>5<c>5.1<a>under5</a>5.5</c>5.9</b>
8 <b>6<c>6.1<d>6.3</d><a>under6.5</a><d>6.7</d>6.8</c>6.9</b>
9 <a>7<c>7.1<a>under7</a>7.5</c>7.9</a>
10</doc>