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