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: Wrong Answer)

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
	
		int i;
	Outer : { for(i = 0; i < s.length()-1; i++)
				for(int j = i+1; j < s.length(); j++)
					if(s.charAt(i) == s.charAt(j))
						break Outer;
			}
		if(i == s.length()-1)
			System.out.println("yes");
		else 
			System.out.println("no");
	}
}