[(0,1),(1,2),(0,3),(1,4),(2,5),(4,6),(3,7),(4,8),(2,9),(9,10),(8,11),(5,12),(6,13),(7,13),(8,14),(14,15),(9,16),(6,17),(7,17),(10,18),(11,19),(13,20),(11,21),(16,22),(20,22),(16,23),(15,23),(20,24),(22,24),(14,25),(12,26),(23,27),(21,28),(26,29),(12,30),(26,31),(15,32),(3,33),(18,34),(18,35),(28,36),(28,37),(25,38),(27,39),(17,40),(25,41),(21,42),(24,43),(5,44),(10,45),(19,46),(27,47),(19,48)]
[(0,1),(1,2),(0,3),(3,4),(2,4),(4,5),(5,6),(2,6),(1,7),(3,8),(7,9),(9,10),(10,11),(6,12),(5,13),(12,14),(8,15),(12,16),(11,16),(15,17),(16,18),(10,19),(17,20),(8,21),(18,22),(21,23),(14,24),(17,24),(7,25),(24,26),(21,26),(20,27),(19,28),(14,29),(25,30),(20,31),(28,32),(13,33),(26,34),(23,35),(18,36),(25,37),(9,38),(15,39),(19,40),(22,41),(11,42),(23,43),(27,44),(27,45),(13,46),(28,47),(22,48)]
