def find_k_product(test_list, K):
  def get_product(val) : 
  	res = 1
  	for ele in val: 
  		res *= ele 
  	return res 
  
  res = get_product([sub[K] for sub in test_list])
  return (res) 
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