t = int(input())
for _ in range(t):
  a, b = map(int, input().split())
  cur = b
  ans = []
  while cur > a:
    d = 1
    while cur % (2 * d) == 0 and cur - (2 * d) >= a:
      d *= 2
    ans.append(d)
    cur -= d

  ans.reverse()
  print(len(ans))
  print(*ans, sep=" ")