def get_nodes(frequency_table):
    """
    Returns nodes
    format nodes={bitcode:edges that represent the bitcode}
    >>> get_nodes([['ab', 5, '11111'], ['ac', 5, '11111'], ['df', 5, '11111'],
    ...            ['bd', 5, '11111'], ['bc', 5, '11111']])
    {'11111': ['ab', 'ac', 'df', 'bd', 'bc']}
    """
    nodes = {}
    for i, item in enumerate(frequency_table):
        nodes.setdefault(item[2], []).append(item[0])
    return nodes