T = int(input())
for case in range(T):
  A,B = map(int,input().split())
  if B-A <= 120: #20:
    print(B-A)
    ans = [1]*(B-A)
    print(*ans)
    continue
  ans = []
  Flag = False
  for i in range(120):
    tempA = A*1
    kaisu = 0
    while tempA%2 == 0:
      kaisu += 1
      tempA //= 2
    beki = pow(2,kaisu)
    if B <= A+beki:
      nokori = B - A
      for j in reversed(range(kaisu)):
        if (nokori>>j)&1 == 1:
          ans.append(pow(2,j))
      break
    else:
      A += beki
      ans.append(beki)
  print(len(ans))
  print(*ans)
  #print(sum(ans))