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