def extract_symmetric(test_list):
  
  temp = set(test_list) & {(b, a) for a, b in test_list}
  res = {(a, b) for a, b in temp if a < b}
  return (res) 
def similar_elements(test_tup1, test_tup2):
  
  res = tuple(set(test_tup1) & set(test_tup2))
  return (res) 