h1 = 0.1;
h2 = h1;
Point(1) = {0, 0, 0, h1};
Point(2) = {4, 0, 0, h2};
Point(3) = {4, 4, 0, h2};
Point(4) = {0, 4, 0, h2};
Point(5) = {1, 0, 0, h1};
Point(6) = {0, 1, 0, h1};
Circle(1) = {5, 1, 6};
Line(2) = {6, 4};
Line(3) = {4, 3};
Line(4) = {3, 2};
Line(5) = {2, 5};
Line Loop(6) = {-1, -2, -3, -4, -5};
Plane Surface(7) = {6};
Physical Surface(8) = {7};
Physical Line("XBlocked") = {2};
Physical Line("YBlocked") = {5};
Physical Line("Traction") = {3};

Physical Point("XBlocked") = {5};
Physical Point("YBlocked") = {5};