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