def maximum_Sum(list1):
     
    maxi = -100000
    for x in list1: 
        sum = 0 
        for y in x: 
            sum+= y      
        maxi = max(sum,maxi)     
    return maxi 
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result