output_description: If A + B is 10 or greater, print the string `error` (case-sensitive);
  otherwise, print the value of A + B.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      A B
attempt: import sys
  import copy
  import  math
  from _bisect import *
  from collections import *
  from operator import itemgetter
  from math import factorial
  """
  from fractions import gcd
  def lcm(x, y):
      return (x * y) // gcd(x, y)
  """
  stdin = sys.stdin
  ni = lambda: int(ns())
  na = lambda: list(map(int, stdin.readline().split()))
  ns = lambda: stdin.readline()
  
  a, b = na()
  print(a + b if a + b  10 else 'error')
  
problem_description: 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.
samples: [{"input": "6 3", "output": "9\n    \n\n* * *"}, {"input": "6 4", "output": "error"}]