def combinations_colors(l, n):
    from itertools import combinations_with_replacement 
    
    return list(combinations_with_replacement(l,n))
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