+ <key name="and">3</key>
+ <key name="and">4</key>
+ <key name="ex">1 2</key>
+ <key name="ex">1 3</key>
+ <key name="ex">1 4</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">3 5</key>
+ <key name="ex">4 1</key>
+ <key name="ex">4 2</key>
+ <key name="ex">4 3</key>
+ <key name="ex">4 4</key>
+ <key name="ex">4 5</key>
+ <key name="ex">5 1</key>
+ <key name="ex">5 2</key>
+ <key name="ex">5 3</key>
+ <key name="ex">5 4</key>
+ <key name="ex">5 5</key>
+ <key name="ex">5 6</key>