from warmup import road_length

lambda_island = [['W', 'W', 'W'],
                 ['W', 'I', 'I'],
                 ['W', 'W', 'W']]

print(road_length(lambda_island))
from warmup import road_length

lambda_island = [['W', 'W', 'W'],
                 ['W', 'I', 'I'],
                 ['W', 'W', 'W']]

print(road_length(lambda_island))