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