<key name="include">basics/pts.ma</key>
<key name="ex">2 2</key>
<key name="ex">2 3</key>
+ <key name="ex">3 1</key>
<key name="ex">3 2</key>
<key name="ex">3 3</key>
+ <key name="ex">3 4</key>
+ <key name="ex">4 1</key>
+ <key name="ex">4 2</key>
<key name="ex">4 3</key>
<key name="or">3</key>
</section>