from itertools import product

grid = [
    ["1","1","1","1","0"],
    ["1","1","0","1","0"],
    ["1","1","0","0","1"],
    ["0","0","0","1","0"]
]

def numIslands(grid):


    def dfs(i, j):

        if i<0 and 
    
print( numIslands(grid) )