I need a java program that creates Palindromes

This program will use RECURSION to generate palindromes from a list of characters inputted by the end user. You should create a GUI that will allow a user to enter in the characters. For the purpose of this assignment the user should be allow to enter a maximum of 5 characters. Once entered the program using recursion should generate and print in the GUI all possible palindromes of length K or less. For example: If a user enters in the letters ‘a’, b’, ‘c’ then the output should be as follows: aba abcba accca cbaabc Since K in this K = 3 the program should allow the generation of palindromes of length 6 or less.