import java.util.*;

public class revSpecial {

public static void main(String args[]) {

Scanner s = new Scanner(System.in);

String str = s.nextLine();

reverseTheString(str);

}

static void reverseTheString(String s) {

char str[]=s.toCharArray();

int r = str.length - 1, l = 0;

while (l < r)

{

if (!Character.isAlphabetic(str[l]))

l++;

else if(!Character.isAlphabetic(str[r]))

r--;

else

{

char tmp = str[l];

str[l] = str[r];

str[r] = tmp;

l++;

r--;

}

}

String rev= new String(str);

System.out.println(rev);

}

}