<｜begin▁of▁sentence｜>### Instruction:
Given a graph with the edge set [(0, 1), (0, 2), (1, 2), (3, 4), (4, 5), (5, 3)], can you use the is_separator function in igraph to determine whether the removal of vertices {1, 2} disconnects the graph?
### Response:
from igraph import Graph

# Define the edges of the graph
g = Graph(edges=[(0, 1), (0, 2), (1, 2), (3, 4), (4, 5), (5, 3)])

# Set of vertices we think might be a separator
vertices_to_remove = {1, 2}

# Check if removing these vertices would disconnect the graph
is_sep = g.is_separator(vertices_to_remove)
print('Is separator:', is_sep)
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