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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

function main(input) {
  input = input.trim();
  const [a,b] = input.split(" ").map(Number);

  if(a+b>=10){
    console.log("error");
  }else{
    console.log(a+b);
  }
    
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));