Pow2 = [pow(2, i) for i in range(61)]

for _ in range(int(input())):
    ANS = []
    a, b = map(int, input().split())
    for i in range(60):
        if a % Pow2[i] == 0 and a % Pow2[i + 1] != 0 and a + Pow2[i] <= b:
            a += Pow2[i]
            ANS.append(Pow2[i])
    for i in range(59, -1, -1):
        if a % Pow2[i] == 0 and a + Pow2[i] <= b:
            a += Pow2[i]
            ANS.append(Pow2[i])
    print(len(ANS))
    print(*ANS)