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