cl1 = 1;
Point(1) = {0, 0, 0, cl1};
Point(2) = {6, 0, 0, cl1};
Point(3) = {0, 4, 0, cl1};
Point(4) = {1, 4, 0, cl1};
Point(5) = {2, 4, 0, cl1};
Point(6) = {4, 4, 0, cl1};
Point(7) = {5, 4, 0, cl1};
Point(8) = {6, 4, 0, cl1};
Point(9) = {1, 3, 0, cl1};
Point(10) = {2, 3, 0, cl1};
Point(11) = {4, 3, 0, cl1};
Point(12) = {5, 3, 0, cl1};
Line(1) = {1, 2};
Line(2) = {3, 4};
Line(3) = {5, 6};
Line(4) = {7, 8};
Line(5) = {9, 10};
Line(6) = {11, 12};
Line(7) = {3, 1};
Line(8) = {4, 9};
Line(9) = {8, 2};
Line(10) = {7, 12};
Line(11) = {5, 10};
Line(12) = {6, 11};
Line Loop(14) = {7, 1, -9, -4, 10, -6, -12, -3, 11, -5, -8, -2};
Plane Surface(14) = {14};
Physical Surface(15) = {14};
Volume(16) = {14};


