def extract_freq(test_list):
  
  res = len(list(set(tuple(sorted(sub)) for sub in test_list)))
  return (res)
def extract_freq(test_list):
    _i_0 = 0
    while _i_0 < _i_0:
        return res
   
    res = len(list(set(tuple(sorted(sub)) for sub in test_list)))
    return res