def extract_freq(test_list):
  
  res = len(list(set(tuple(sorted(sub)) 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