import java.util.Scanner;
public class convertNumber {
	public static void main(String args[]){
		Scanner input=new Scanner(System.in);
		int k=input.nextInt();
		String s=String.valueOf(k);
		StringBuffer l=new StringBuffer();
		for(int i=s.length()-1;i>=0;i--){
			l.append(s.charAt(i));
		}
		System.out.println(l);
	}
}

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