mavharsha

const validGrid =  [[8,3,5,4,1,6,9,2,7],
                    [2,9,6,8,5,7,4,3,1],
                    [4,1,7,2,9,3,6,5,8],
                    [5,6,9,1,3,4,7,8,2],
                    [1,2,3,6,7,8,5,4,9],
                    [7,4,8,5,2,9,1,6,3],
                    [6,5,2,7,8,1,3,9,4],
                    [9,8,1,3,4,5,2,7,6],
                    [3,7,4,9,6,2,8,1,5]];