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")