import itertools
import fractions
def main():
  a,b = map(int,input().split())
  print(a+b if b%a == 0 else b-a)
if __name__ == '__main__':
  main() import itertools itertools import fractions fractions def main():
  a,b = map(int,input().split())
  print(a+b if b%a == 0 else b-a) main a,b = map(int,input().split()) a map(int,input().split()) map int input().split() ().split () input split b print(a+b if b%a == 0 else b-a) print a+b if b%a == 0 else b-a b%a == 0 b%a b a 0 a+b a b b-a b a if __name__ == '__main__':
  main() __name__ == '__main__' __name__ '__main__' main() main def main():
  a,b = map(int,input().split())
  print(a+b if b%a == 0 else b-a) def main():
  a,b = map(int,input().split())
  print(a+b if b%a == 0 else b-a) main
import itertools
import fractions
def main():
  a,b = map(int,input().split())
  print(a+b if b%a == 0 else b-a)
if __name__ == '__main__':
  main()