Palindrome Swapper

Have the function PalindromeSwapper(str) take the str parameter being passed and determine if a palindrome can be created by swapping two adjacent characters in the string. If it is possible to create a palindrome, then your program should return the palindrome, if not then return the string -1. The input string will only contain alphabetic characters. For example: if str is "rcaecar" then you can create a palindrome by swapping the second and third characters, so your program should return the string racecar which is the final palindromic string.

Examples

Input: "anna"
Output: anna

Input: "kyaak"
Output: kayak