T = int(input())
for i in range(T):
    A,B = map(int,input().split())
    ans = []
    while A < B:
        x = 1
        while A+2*x <= B and A % (2*x) == 0:
            x *= 2
        ans.append(x)
        A += x
    print(len(ans))
    print(*ans)