group() {
	multmatrix([[1, 0, 0, -12], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		union() {
			cube(size = [10, 10, 10], center = false);
			multmatrix([[1, 0, 0, 4], [0, 1, 0, 4], [0, 0, 1, 8], [0, 0, 0, 1]]) {
				cube(size = [2, 2, 10], center = false);
			}
		}
	}
	union() {
		cube(size = [10, 10, 10], center = false);
		multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 10], [0, 0, 0, 1]]) {
			cube(size = [2, 2, 10], center = false);
		}
	}
	multmatrix([[1, 0, 0, 12], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		union() {
			cube(size = [10, 10, 10], center = false);
			multmatrix([[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 11], [0, 0, 0, 1]]) {
				cube(size = [2, 2, 10], center = false);
			}
		}
	}
	multmatrix([[1, 0, 0, 24], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		union() {
			cube(size = [10, 10, 10], center = false);
			multmatrix([[1, 0, 0, 4], [0, 1, 0, 4], [0, 0, 1, 10], [0, 0, 0, 1]]) {
				cube(size = [2, 2, 10], center = false);
			}
		}
	}
	multmatrix([[1, 0, 0, -12], [0, 1, 0, 12], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		union() {
			cube(size = [10, 10, 10], center = false);
			multmatrix([[1, 0, 0, -2], [0, 1, 0, 10], [0, 0, 1, 10], [0, 0, 0, 1]]) {
				cube(size = [2, 2, 10], center = false);
			}
		}
	}
	multmatrix([[1, 0, 0, 0], [0, 1, 0, 12], [0, 0, 1, 0], [0, 0, 0, 1]]) {
		union() {
			cube(size = [10, 10, 10], center = false);
			multmatrix([[1, 0, 0, 0], [0, 1, 0, 10], [0, 0, 1, 10], [0, 0, 0, 1]]) {
				cube(size = [2, 2, 10], center = false);
			}
		}
	}
}