import sys input = lambda :sys.stdin.readline()[:-1] ni = lambda :int(input()) na = lambda :list(map(int,input().split())) sys.setrecursionlimit(10**7) yes = lambda :print("yes");Yes = lambda :print("Yes") no = lambda :print("no");No = lambda :print("No") ####################################################################### a,b = na() if a<b: a,b=b,a if a==b or (a,b)==(2,2) or (a,b)==(4,2): print("Yes") else: print("No")