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