[(0,1),(1,2),(2,3),(1,3),(0,4),(3,4),(4,5),(2,6),(6,7),(5,8),(7,9),(6,9),(9,10),(5,10),(8,11),(10,11),(7,12),(12,13),(11,14),(13,14),(12,15),(13,16),(14,17),(16,17),(15,18),(16,19),(15,20),(19,21),(18,22),(17,22),(8,23),(23,24),(20,25),(18,26),(24,27),(25,27),(21,28),(20,28),(25,29),(28,30),(27,31),(26,32),(22,33),(26,34),(24,35),(23,36),(21,37),(19,38)]
[(0,1),(0,2),(2,3),(2,4),(1,4),(3,5),(5,6),(4,6),(5,7),(1,8),(7,8),(8,9),(7,10),(9,10),(10,11),(6,12),(12,13),(11,14),(13,15),(9,16),(12,17),(15,18),(14,19),(18,20),(16,20),(19,21),(13,21),(17,22),(20,23),(21,23),(23,24),(17,25),(15,25),(24,26),(16,26),(24,27),(22,28),(27,28),(25,29),(27,30),(3,31),(11,32),(14,33),(28,34),(22,35),(18,36),(19,37),(26,38)]
