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)