def cavityMap(grid):
    # Write your code here
    n = len(grid)
    new_grid = grid.copy()
    for i in range(1, n-1):
        for j in range(1, n-1):
            current = grid[i][j]
            top = grid[i-1][j]
            bottom = grid[i+1][j]
            left = grid[i][j-1]
            right = grid[i][j+1]
            if current > top and current > bottom and current > left and current > right:
                new_grid[i] = new_grid[i][:j] + "X" + new_grid[i][j+1:]
                
    return new_grid