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 C++14 (Clang 3.8.0) (judge verdict: Accepted)

#include <iostream>
using namespace std;
typedef long long unsigned int ll;
 
int main() {
 
  int a,b,c,d;
  cin >> a;
  cin >>b;
  cin >>c;
  if(a+b>9){
	cout <<"error" <<endl;
  }else{
	cout << a+b <<endl;
  }
    return 0;
}