Convertions (Assembly)

I need a simple program that is written in Assembly language. It needs to convert a string of lower case letters into upper case letters using the AND DL,0DFh instruction. It also needs to convert a string of upper case letters into lower cases using a instruction as simple as the one above mentioned (AND DL,0DFh). Example for lower to upper: Display a user prompt like this, PLEASE ENTER A STRING OF LOWER CASE LETTERS: User enters the string and then it displays the output in upper cases letters Then: Example for upper to lower Display a user prompt like this, PLEASE ENTER A STRING OF UPPER CASE LETTERS: User enters the string and then it displays the output in lower cases letters ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. COMMENT HEAVILY!!! ## Platform TASM ## Deadline information I need the program as soon as humanly possible...actually by no later then Tuesday afternoon!