if __name__ == '__main__':
    A, B = map(int, input().split())
    if B%A == 0:
        print(A+B)
    else:
        print(B - A) if __name__ == '__main__':
    A, B = map(int, input().split())
    if B%A == 0:
        print(A+B)
    else:
        print(B - A) __name__ == '__main__' __name__ '__main__' A, B = map(int, input().split()) A map(int, input().split()) map int input().split() ().split () input split B if B%A == 0:
        print(A+B)
    else:
        print(B - A) B%A == 0 B%A B A 0 print(A+B) print A+B A B print(B - A) print B - A B A A, B = map(int, input().split()) map(int, input().split()) A B = map(int, input().split()) map(int, input().split()) B
if __name__ == '__main__':
    A, B = map(int, input().split())
    if B%A == 0:
        print(A+B)
    else:
        print(B - A)