<key name="include">basics/pts.ma</key>
<key name="ex">2 1</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">4 2</key>
<key name="ex">4 3</key>
<key name="ex">4 4</key>
+ <key name="ex">5 2</key>
<key name="ex">5 3</key>
<key name="ex">5 4</key>
<key name="ex">6 4</key>