Problem:
Score : 100 points

Problem Statement

You are given two integers A and B as the input. Output the value of A + B.

However, if A + B is 10 or greater, output error instead.

Constraints

A and B are integers.

1 ≤ A, B ≤ 9

Input

Input is given from Standard Input in the following format:

A B

Output

If A + B is 10 or greater, print the string error (case-sensitive); otherwise, print the value of A + B.

Sample Input 1

6 3

Sample Output 1

9

Sample Input 2

6 4

Sample Output 2

error

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.Scanner;
/**
 * Created by maxmo on 19.06.2017.
 */
public class Main {
    public static void main(String[] args){
        Scanner s = new Scanner(System.in);
        int a = s.nextInt();
        int b = s.nextInt();

        System.out.println((a + b >= 10)? "error" : a + b);
    }
}