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