var str string
		if len(scanner.Text()) > 2 {
			str = palindrome(scanner.Text())
		}
		if len(str) > 2 {
			fmt.Println(str)

		if len(scanner.Text()) > 3 {
			fmt.Println(Palindrome(scanner.Text()))
		} else {
			fmt.Println("Input string too short")

func palindrome(str string) string {

// Single thread version
func palindrome_single(str string) string {
	longest := ""
	for k := 0; k < len(str)/2+1; k++ {
		candidate := string(str[k])
		for i := 1; true; i++ {
			// avoid overrun or underrun
			if (k-i < 0) || (k+i > len(str)-1) {
				break
			}
			// two identical bytes
			if str[k-i] == str[k+i] {
				candidate = string(str[k-i]) + candidate + string(str[k+i])
			} else {
				break
			}
		}
		if len(candidate) > len(longest) {
			longest = candidate
		}
	}
	return longest
}
// Returns the longest palindrome in str
// Concurrent version
func Palindrome(str string) string {