<｜begin▁of▁sentence｜>### Instruction:
Given a graph with three vertices connected in a cycle (A, B, C), can you save this graph to a file in Pajek format?
### Response:
from igraph import Graph

# Create a graph
g = Graph(edges=[(0, 1), (1, 2), (2, 0)])

# Add some vertex labels
g.vs['label'] = ['A', 'B', 'C']

# Save the graph to a Pajek-formatted file
g.write_pajek('my_graph.net')
<|EOT|>
