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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def line_column(self) -> Tuple[int, int]: """Return line and column coordinates."""

        ln = self.input.count("\n", 0, self.offset)
        c = (self.offset if ln == 0 else
             self.offset - self.input.rfind("\n", 0, self.offset) - 1)
        return (ln + 1, c)