input: Write a python function to check if the input word is 'super' (case insensitive) and print 'Object found' if it matches.
  assert check_word('super') == 'Object found'
  assert check_word('SUPER') == 'Object found'
  assert check_word('Super') == 'Object found'
  assert check_word('not super') is None
output: def check_word(word):
      if word.lower() == 'super':
          print('Object found')