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