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