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.
a,b = map(int, input().split())

if a + b < 10:
  print('Yes')
else:
  print('error')
a,b = map(int, input().split())

if a + b < 10:
  print(a + b)
else:
  print('error')