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