Point(1) = {0, 0, 0, 1.0};
Point(2) = {1, 0, 0, 1.0};
Point(3) = {1, 1, 0, 1.0};
Point(4) = {0, 1, 0, 1.0};
Point(5) = {0.1, 0.1, 0, 1.0};
Point(6) = {0.1, 0.9, 0, 1.0};
Point(7) = {1, 0.9, 0, 1.0};
Point(8) = {1, 0.1, 0, 1.0};
Line(1) = {4, 3};
Line(2) = {3, 7};
Line(3) = {7, 6};
Line(4) = {6, 5};
Line(5) = {5, 8};
Line(6) = {8, 2};
Line(7) = {2, 1};
Line(8) = {1, 4};
Line Loop(9) = {3, 4, 5, 6, 7, 8, 1, 2};
Plane Surface(10) = {9};
Point(9) = {0.2, 0.1, 0.45, 1.0};
Point(10) = {0.7, 0.1, 0.45, 1.0};
Point(11) = {0.7, 0.9, 0.45, 1.0};
Point(12) = {0.2, 0.9, 0.45, 1.0};
Line(11) = {12, 11};
Line(12) = {11, 10};
Line(13) = {10, 9};
Line(14) = {9, 12};
Line Loop(15) = {12, 13, 14, 11};
Plane Surface(16) = {15};
Plane Surface(17) = {9};
Extrude {0, 0, 1} {
  Surface{10};
}
Extrude {0, 0, 0.1} {
  Surface{16};
}
Coherence;
Coherence;
Coherence;
Coherence;
Coherence;
Coherence;
Coherence;
Surface Loop(82) = {54, 10, 30, 34, 38, 42, 46, 50, 59, 58};
Coherence;
Delete {
  Volume{2};
}
Delete {
  Volume{1};
}
Delete {
  Surface{30, 80, 72, 38};
}
Line Loop(83) = {21, -37, -5, 33};
Line Loop(84) = {62, -71, -13, 67};
Plane Surface(85) = {83, 84};
Line Loop(86) = {29, -19, -28, 3};
Line Loop(87) = {64, -66, -11, 75};
Plane Surface(88) = {86, 87};
Surface Loop(89) = {50, 10, 88, 34, 85, 59, 42, 46, 54, 58, 68, 16, 76, 81};
Volume(90) = {89};
