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