import sys
sys.setrecursionlimit(10**7)
def main(a,b):
  if b-a<3:return [1]*(b-a)
  if b==a:return []
  if b==a+1:return [1]
  if b==a+2 and a%2==0:return [2]
  if b==a+2:return [1,1]
  if 2*a<=b:
    ret=[a]+main(2*a,b)
    return ret
  ary=[]
  if a%2==1:
    ary.append(1)
    a+=1
  d=2
  while a+2*d<=b and a%(2*d)==0:
    d*=2
  ary+=[d]+main(a+d,b)
  return ary

def chk(a,b,ret):
  if len(ret)>120:return False,0,len(ret)
  for x in ret:
    if a%x==0:
      a+=x
    else:
      return False,1,x,ret
  return a==b,2,ret
if __name__=='__main__':
  t=int(input())
  cases=[list(map(int,input().split())) for _ in range(t)]
  for a,b in cases:
    ret=main(a,b)
    print(len(ret))
    print(*ret)