t=int(input())
ab=[list(map(int,input().split())) for _ in range(t)]
for a,b in ab:
	ary=[]
	now=1
	while b-a>0:
		while a%(2*now)==0:
			now*=2
		while a%now!=0:
			now//=2
		while b-a<now:
			now//=2
		a+=now
		ary.append(now)
	print(len(ary))
	print(*ary)