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
    a4 = a
    while a2 % 2 == 0:
        k += 1
        a2 //= 2
    ad = pow(2,k)
    while b >= a + ad and a2 > 1:
        ans.append(ad)
        a += ad
        a2 += 1
        while a2 % 2 == 0:
            k += 1
            a2 //= 2
        ad = pow(2,k)
    while b >= 2 * a and a2 == 1:
        ans.append(a)
        a *= 2
        k += 1
    ad = pow(2,k)
    while b > a:
        if b >= a +ad:
            a += ad
            ans.append(ad)
        if k > 0:
            k -= 1
        ad = pow(2,k)
    print(len(ans))
    print(*ans)