

def solve():

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


if __name__ == "__main__":
    solve() def solve():

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

    A, B = map(int, input().split())
    if B % A == 0:
        print(A+B)
    else:
        print(B-A) def solve():

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


def solve():

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


if __name__ == "__main__":
    solve()
