if __name__ == '__main__':

    arr = []

    for _ in range(6):
        arr.append(list(map(int, input().rstrip().split())))
        
    row= len(arr)
    p=row-2
    n=[]
    
    while len(n)<=(p*p):
        for i in range(p):
            for j in range(p):
                
                summ=(arr[i][j]+arr[i][j+1]+arr[i][j+2])+(arr[i+1][j+1])+(arr[i+2][j]+arr[i+2][j+1]+arr[i+2][j+2])
                
                n.append(summ)
    
    print(max(n))