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