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.io.*;
import java.util.*;

public class Main{
  public static void main(String[] args) {
    try(BufferedReader in = new BufferedReader(new InputStreamReader(System.in))){
      String[] sArr = in.readLine().split(" ");
      int A = Integer.parseInt(sArr[0]);
      int B = Integer.parseInt(sArr[1]);
      if (A+B >= 10){
        System.out.println("error");
      }else{
        System.out.println(A+B);
      }
    }catch(IOException e){
      e.printStackTrace();
    }
  }
}