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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 prepend(x: T, xs: Iterable[T]) -> Iterator[T]: """ Prepend a value to an iterable. Parameters x An element of type T. xs An iterable of elements of type T. Returns ------- Iterator An iterator that yields *x* followed by elements of *xs*. Examples -------- [1, 2, 3] """

    return chain([x], xs)