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