
tcfail106.hs:11:10:
    No instance for (S Int)
      arising from the superclasses of an instance declaration
    Possible fix: add an instance declaration for (S Int)
    In the instance declaration for `C Int'

tcfail106.hs:14:10:
    No instance for (S Int)
      arising from the superclasses of an instance declaration
    Possible fix: add an instance declaration for (S Int)
    In the instance declaration for `D Int'
