palindrome (s[], first, last)
     if s[first] == s[last] and s[first] == 'a' or 'b'
          if first == last
               This string is in the language
          else
               So far this string is in the language
               palindrome (s[], first+1, last-1)
     else
          This string is not in the language

boolean isPalindrome(string s){
     char[] letters = s.toCharArray() //convert string to array of characters
     int firstCnt = 0 //counter for left side
     int secCnt = letters.length - 1 //counter for right side
     while (firstCnt < secCnt){ //work toward middle
          if (letters[firstCnt] != letters[secCnt]){
               return false //if left and right does not match, is not a palindrome
          }
     }
     return true //if loop completes without a false, is a palinrome
}