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