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