Return the cut-hyperedges of the given hypergraph.
    
    @type  hypergraph: hypergraph
    @param hypergraph: Hypergraph
    
    @rtype:  list
    @return: List of cut-nodes.

def _cut_hyperedges(hypergraph):
    """
    Return the cut-hyperedges of the given hypergraph.
    
    @type  hypergraph: hypergraph
    @param hypergraph: Hypergraph
    
    @rtype:  list
    @return: List of cut-nodes.
    """
    edges_ = cut_nodes(hypergraph.graph)
    edges = []
    
    for each in edges_:
        if (each[1] == 'h'):
            edges.append(each[0])
    
    return edges