title: How to find the position of a letter in a string in python
body: <p>I need to find the location of any letter that will be provid by the user.
  But it's esentiel that we can't use the commands: Index, enumerate .
  So I need to use both strings that we have in the beginning and after that the definition will be used to code files and sentences !</p>
  
  <p>how do i foud the position of the letter in my both strings ?
  That's what I have tell now </p>
  
  <pre><code>lowers_letters = "abcdefghijklmnopqrstuvwxyz"
  uppers_letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  letter=str(input('pleas tape a letter: '))
  def find_number_ofletter(letter):
      return ord(letter) - 97
  
  
  
  
  if __name__ == '__main__':
      if letter in (lowers_letters or uppers_letters):
          find_number_ofletter(letter)
      else:
          print('pleas try again')
  </code></pre>