old_contents: person = "Harold Finch"
  print person[0],person[1]; # H a
  print person[0:6] # Harold
  greeting = "Hello " + person; # Hello Harold Finch
  print greeting[:6] + "John Reese"; # Hello John Reese
  contains = 'H' in person;
  notcontains = 'R' in person;
  print contains, notcontains; # True, False
new_contents: person = "Harold Finch"
  print person[0],person[1]; # H a
  print person[0:6] # Harold
  greeting = "Hello " + person; # Hello Harold Finch
  print greeting[:6] + "John Reese"; # Hello John Reese
  contains = 'H' in person;
  notcontains = 'R' in person;
  print contains, notcontains; # True, False
  print len(person); # Prints length : 12
  print person.isalpha(), "this".isalpha(); #False True
  print person.islower(), "yo".islower(); # False True
  print person.lower(); # harold finch
subject: add some built-in functions