A, B = (int(x) for x in input().split())
print(A+B if B%A==0 else B-A) int(x) for x in input().split() for x in input().split() x input().split() ().split () input split for x in input().split() int(x) int x A, B = (int(x) for x in input().split()) A (int(x) for x in 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 B = (int(x) for x in input().split()) (int(x) for x in input().split()) B A, B = (int(x) for x in input().split()) (int(x) for x in input().split()) A
A, B = (int(x) for x in input().split())
print(A+B if B%A==0 else B-A)