<｜begin▁of▁sentence｜>### Instruction:
Given a graph with edges defined as (0, 1), (1, 2), (2, 0), (0, 3), (3, 4), (4, 5), (5, 3), can you use `clique_number` function in igraph to calculate the size of the largest clique?
### Response:
import igraph as ig

g = ig.Graph(edges=[(0, 1), (1, 2), (2, 0), (0, 3), (3, 4), (4, 5), (5, 3)])

# Calculate the clique number of the graph (size of the largest clique)
clique_num = g.clique_number()

print('The clique number of the graph is:', clique_num)
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