[(0,1),(0,2),(2,3),(1,4),(4,5),(2,6),(6,7),(4,8),(7,9),(1,10),(9,11),(10,12),(8,13),(3,14),(12,15),(12,16),(5,17),(15,17),(14,18),(6,19),(11,20),(8,21),(20,22),(3,23),(13,24),(18,25),(13,26),(18,27),(7,28),(5,29),(15,30),(19,31),(10,32),(19,33),(17,34),(11,35),(9,36),(20,37),(16,38),(14,39),(16,40)]
[(0,1),(0,2),(1,3),(2,4),(3,5),(4,6),(1,7),(7,8),(4,9),(6,10),(9,11),(7,12),(10,13),(11,13),(11,14),(14,15),(2,16),(8,17),(10,18),(9,19),(18,20),(15,21),(5,22),(16,23),(15,24),(20,25),(16,26),(14,27),(20,28),(17,29),(8,30),(3,31),(18,32),(19,33),(12,34),(17,35),(12,36),(13,37),(6,38),(5,39),(19,40)]
