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