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