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