def f(x):
    ret = 0
    while(x%2 == 0):
        ret += 1
        x = x//2
    return ret

t = int(input())
for _ in range(t):
    a,b = map(int,input().split())
    lis = []
    k = 0
    
    while (a != b):
        r = f(a)
        c = b-a
        if 2**r > c:
            while 2**r > c:
                r -= 1
        
        a += 2**r
        k += 1
        lis.append(2**r)
    print(k)
    for i in range(k):
        print(lis[i],end="")
        if i != k-1:
            print(" ",end="")
    print()