T = int(input())
for _ in range(T):
    A, B = map(int, input().split())
    ans = []
    nokori = 120
    flag = 1
    while A != B and flag:
        while 2 * A <= B:
            ans.append(A)
            A *= 2
            nokori -= 1
            
        if B - A <= nokori:
            ans.extend([1] * (B - A))
            break
                    
        ind = 0
        while A <= B:
            print(A, B, ans, sum(ans))
            two = 2 ** ind
            for i in range(ind + 1):
                if (B - A)//(2**i) <= nokori and (B - A)%(2**i)==0:
                    ans.extend([2**i] * ((B - A)//(2**i) ))
                    A += sum([2**i] * ((B - A)//(2**i) ))
                    break
            if A % two == 0:
                if A + A // two <= B:
                    ans.append(A // two)
                    A += A // two
                    nokori -= 1
                    ind = 0
                    break
                else:
                    ind += 1
            else:
                if A + two // 2 > B:
                    flag = 0
                    break
                A += two // 2
                nokori -= 1
                ans.append(two // 2)
        
        cnt = 0
        for i in range(60):
            if ((B - A) >> i) & 1:
                ans.append(1 << i)
                cnt += 1 << i              
    
            
    print(len(ans))
    print(*ans)