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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main {
	public static void main(String[] args) throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try {
			String str = br.readLine();
//			int N = Integer.parseInt(str);
//			str = br.readLine();
			String[] s = str.split(" ",0);
			int a = Integer.parseInt(s[0]);
			int b = Integer.parseInt(s[1]);
			if((a+b)<10) {
				System.out.println(a+b);
			}else {
				System.out.println("error");
			}
//			long max  = 1000000007;
		}catch (Exception e) {
			System.exit(0);
		}
	}
}