def remove_duplicate(list1):
 import itertools
 
 list.sort(list1)
 remove_duplicate = list(list1 for list1,_ in itertools.groupby(list1))
 return remove_duplicate
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