<｜begin▁of▁sentence｜>### Instruction:
Given a directed graph with vertices 0, 1, 2, and 3, and edges forming a simple sequence like (0, 1), (1, 2), (2, 3), and finally a shortcut (0, 3), can you use triad_census in igraph to classify all triplets of vertices and provide the triad census result?
### Response:
import igraph as ig

# Create a directed graph
g = ig.Graph(directed=True)
g.add_vertices(4)
g.add_edges([(0, 1), (1, 2), (2, 3), (0, 3)])

# Perform the triad census
triad_census_result = g.triad_census()

# Print the result
print(triad_census_result)
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