solved_grid = [
    [4,3,5,2,6,9,7,8,1],
    [6,8,2,5,7,1,4,9,3],
    [1,9,7,8,3,4,5,6,2],
    [8,2,6,1,9,5,3,4,7],
    [3,7,4,6,8,2,9,1,5],
    [9,5,1,7,4,3,6,2,8],
    [5,1,9,3,2,6,8,7,4],
    [2,4,8,9,5,7,1,3,6],
    [7,6,3,4,1,8,2,5,9]
]