[(0,1),(0,2),(2,3),(1,3),(2,4),(1,5),(3,5),(4,6),(6,7),(5,8),(4,9),(6,10)]
[(0,1),(0,2),(2,3),(1,3),(2,4),(1,5),(3,5),(4,6),(6,7),(5,8),(4,9),(6,10)]
