interface StringFunction
{ String reverse(String s); }

public class BlockLambdaReverse
{
	public static void main(String[] args)
	{
		java.util.Scanner scan = new java.util.Scanner(System.in);
		
		StringFunction sf = (s) -> {
			String r = "";
			for(int i=s.length()-1; i>=0; i--)
				r += s.charAt(i);
			return r;
		};
		System.out.println("Enter an input string: ");
		String s = scan.nextLine();
		System.out.println("The reverse of "+s+" is "+sf.reverse(s));
	}
}