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