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