#include <bits/stdc++.h>
#include <atcoder/all>

using namespace std;
using namespace atcoder;

#define ll long long


void solve()
{
    ll A, B;
    cin >> A >> B;

    vector<ll> answer;
    ll v = 1;
    for (int i = 0; i < 60; ++i)
    {
        if (A % (2 * v) != 0 && A + v <= B)
        {
            A += v;
            answer.push_back(v);
        }
        v <<= 1;
    }

    v = (ll)1 << 59;
    for (int i = 0; i < 60; ++i)
    {
        if (A + v <= B)
        {
            A += v;
            answer.push_back(v);
        }
        v >>= 1;
    }

    cout << answer.size() << "\n";
    for (auto &p: answer) cout << p << " ";
    cout << "\n";
    return;
}


int main()
{
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr);

    int t = 1;
    std::cin >> t;
    while (t--)
        solve();

    return 0;
}