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