def Diff(li1,li2):
    
    return (list(list(set(li1)-set(li2)) + list(set(li2)-set(li1))))
 
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