T = int(input())
AB = [list(map(int,input().split())) for _ in range(T)]

for a,b in AB:
    ans = []
    k = 0
    a2 = a
    a3 = a
    while a2 % 2 == 0:
        k += 1
        a2 //= 2
    while (b-a)//2 > pow(2,k):
        ad = pow(2,k)
        a += ad
        ans.append(ad)
        k += 1
    while b > a:
        ad = pow(2,k)
        if b >= a + ad:
            a += ad
            ans.append(ad)
        if k > 0:
            k -= 1
    print(len(ans))
    print(*ans)
    #print(a3 + sum(ans))