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Hi,
as this is the one and only post for problem #10904, I'll ask here:

do you have some more test-cases for this problem ?

What's the output for:
type A = int
type B = char
type C = A
-
type A = B
type B = A
-
type A = int
type B = char
type C = struct(A B)
type D = struct(A A)
type E = struct(B ...