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\\partial G_\\phi$.\n  We prove that for any $\\phi$ as above, the map $\\hat \\iota$ is finite-to-one and that the preimage of every point of $\\partial G_\\phi$ has cardinality $\\le 2N$.\n  We also prove that every point $S\\in \\partial G_\\phi$ with $\\ge 3$ preimages in $\\partial F_N$ has the form $(wt^m)^\\infty$ 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