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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 siblings(client, revision, paths):
 """Show siblings for given paths."""

    graph = Graph(client)
    nodes = graph.build(paths=paths, revision=revision)
    siblings_ = set(nodes)
    for node in nodes:
        siblings_ |= graph.siblings(node)

    paths = {node.path for node in siblings_}
    for path in paths:
        click.echo(graph._format_path(path))