x=[0,-2,-2,-1,-1,1,1,2,2]
y=[0,-1,1,-2,2,-2,2,-1,1]
a,b=map(int,input().split())
out="NO"
for i in range(9):
	for j in range(9):
		for k in range(9):
			if (a,b)==(x[i]+x[j]+x[k],y[i]+y[j]+y[k]):out="YES"
print(out)