#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;

    cerr << A << ", " << B << "\n";

    vector<ll> answer;
    while (A != B && answer.size() < 120)
    {
        if (A + A <= B) 
        {
            answer.push_back(A);
            A += A;
            continue;
        }

        if (A % 2 == 1)
        {
            answer.push_back(1);
            A++;
            continue;
        }

        ll v = A;
        while (A + v > B) v /= 2;
        answer.push_back(v);
        A += v;
    }
    
    cout << answer.size() << "\n";
    for (auto &v : answer)
        cout << v << " ";
    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;
}