def check_substring(string, sample) :
  import re 
   
  if (sample in string): 
      y = "\A" + sample 
      x = re.search(y, string) 
      if x : 
          return ("string starts with the given substring") 
      else : 
          return ("string doesnt start with the given substring") 
  else : 
      return ("entered string isnt a substring")
def similar_elements(test_tup1, test_tup2):
  
  res = tuple(set(test_tup1) & set(test_tup2))
  return (res) 