[
[(1,1),(1,2),(1,3),(1,4),(1,5)],
[(2,1),(2,2),(2,3),(2,4),(2,5)],
[(3,1),(3,2),(3,3),(3,4),(2,6)],
[(4,1),(4,2),(4,3),(4,4),(2,7)],
[(5,1),(5,2),(5,3),(5,4),(5,7)]
]
