canvas {
    width = 500
    height = 500
}

forall Set A; Set B
where SubSet(A, B) {
    ensure disjoint(B.text, A.icon, 10.0)
    ensure contains(A.icon, B.icon, 5.0)
    layer A.icon above B.icon
}

forall Set A; Set B
where Disjoint(A, B) {
    ensure disjoint(A.icon, B.icon)
}

forall Set A; Set B
where Union(A,B) {
    ensure overlapping(A.icon, B.icon)
    ensure disjoint(A.text, B.icon)
    ensure disjoint(B.text, A.icon)
}

forall Set x {
    shape x.icon = Circle {
        strokeWidth : 0.0
    }
    shape x.text = Equation {
        string : x.label
        fontSize : "32px"
    }
    ensure contains(x.icon, x.text)
    encourage norm(x.text.center - x.icon.center) == 0
    layer x.text above x.icon
    ensure x.icon.r > 25.0
}