a.x : Nat
b.x : Nat
c.x : Nat
b.y : Nat
c.y : Nat
c.z : Nat
A.x a : Nat
A.x (B.toA b) : Nat
A.x (B.toA (C.toB c)) : Nat
B.y b : Nat
B.y (C.toB c) : Nat
C.z c : Nat
x.val : Nat
y.val : Nat
z.val : Nat
d.x : Nat
c.x : Nat
@Fin.val 5 x : Nat
@Fin.val 5 y.toFin : Nat
@Fin.val 5 (@Fin''.toFin 5 z) : Nat
(@D.toA 5 d).x : Nat
f.toFun 0 : Int