/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static String reverse(String s) {
        if ("".equals(s)) {
            return s;
        }
        else {
            return reverse(s.substring(1,s.length())) + s.charAt(0);
        }
    }
 
 
    public static void main(String args[]) {
 
        System.out.print(reverse("galskjdf"));
    }
}

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