[(0,1),(0,2),(2,3),(1,3),(2,4),(1,5),(5,6),(4,6),(5,7),(6,8),(7,9),(4,10),(7,11),(3,12)]
[(0,1),(1,2),(1,3),(0,4),(4,5),(2,5),(2,6),(3,6),(3,7),(5,8),(7,9),(7,10),(4,11),(6,12)]
