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