def combine_lists(num1,num2):
  from heapq import merge
  
  combine_lists=list(merge(num1, num2))
  return combine_lists
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