<!-- edges -->
    <!-- top -->
    <set mask="x0x-111-x1x" tiles="6,5; 7,5; 8,5; 9,5"/>
    <!-- bottom -->
    <set mask="x1x-111-x0x" tiles="6,10; 7,10; 8,10; 9,10"/>
    <!-- left -->
    <set mask="x1x-011-x1x" tiles="5,6; 5,7; 5,8; 5,9"/>
    <!-- right -->
    <set mask="x1x-110-x1x" tiles="10,6; 10,7; 10,8; 10,9"/>

    <!-- h pillar == -->
    <set mask="x0x-111-x0x" tiles="2,6; 2,7; 2,8; 2,9"/>
    <!-- v pillar left -->
    <set mask="x0x-011-x0x" tiles="1,6; 1,7; 1,8; 1,9"/>
    <!-- v pillar right -->
    <set mask="x0x-110-x0x" tiles="3,6; 3,7; 3,8; 3,9"/>

    <!-- v pillar || -->
    <set mask="x1x-010-x1x" tiles="6,2; 7,2; 8,2; 9,2"/>
    <!-- v pillar top -->
    <set mask="x0x-010-x1x" tiles="6,1; 7,1; 8,1; 9,1"/>
    <!-- v pillar bottom -->
    <set mask="x1x-010-x0x" tiles="6,3; 7,3; 8,3; 9,3"/>

    <!-- single tiles -->
    <set mask="x0x-010-x0x" tiles="1,1; 2,1; 1,2; 2,2"/>

    <!-- corner top left -->
    <set mask="x0x-011-x1x" tiles="4,4; 5,4; 4,5; 5,5"/>
    <!-- corner top right -->
    <set mask="x0x-110-x1x" tiles="10,4; 11,4; 10,5; 11,5"/>
    <!-- corner bottom left -->
    <set mask="x1x-011-x0x" tiles="4,10; 5,10; 4,11; 5,11"/>
    <!-- corner bottom right -->
    <set mask="x1x-110-x0x" tiles="10,10; 11,10; 10,11; 11,11"/>
    
    <!-- inside corner top left -->
    <set mask="111-111-110" tiles="1,3"/>
    <!-- inside corner bottom left -->
    <set mask="110-111-111" tiles="1,4"/>
    <!-- inside corner top right -->
    <set mask="111-111-011" tiles="2,3"/>
    <!-- inside corner bottom right -->
    <set mask="011-111-111" tiles="2,4"/>

    <!-- |== -->
    <set mask="110-111-110" tiles="11,7"/>
    <!-- _||_ -->
    <set mask="010-111-111" tiles="7,4"/>
    <!-- ==| -->
    <set mask="011-111-011" tiles="4,7"/>
    <!-- T||T -->
    <set mask="111-111-010" tiles="7,11"/>

    <!-- ???? -->
    <set mask="010-111-110" tiles="3,2"/>
    <!-- ???? -->
    <set mask="010-111-011" tiles="4,2"/>
    <!-- ???? -->
    <set mask="011-111-010" tiles="4,1"/>
    <!-- ???? -->
    <set mask="110-111-010" tiles="3,1"/>
    <!-- ???? -->
    <set mask="010-111-010" tiles="3,3"/>
    <!-- ???? -->
    <set mask="110-111-011" tiles="3,4"/>
    <!-- ???? -->
    <set mask="011-111-110" tiles="4,3"/>

    <set mask="padding" tiles="6,6; 7,6; 8,6; 9,6;  6,7; 6,8; 6,9;  9,7; 9,8; 9,9;  7,9; 8,9"/>
    <set mask="center" tiles="7,7; 8,7; 7,8; 8,8"/>
  </Tileset>