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