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