import numpy as np
import sys

a, b = map(int, input().split())
if b % a == 0:
	print(a + b)
else:
	print(b - a) import numpy as np numpy import sys sys 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 b = map(int, input().split()) map(int, input().split()) b a, b = map(int, input().split()) map(int, input().split()) a
import numpy as np
import sys

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