#include <bits/stdc++.h>
using namespace std;
using lint         = long long;
constexpr lint inf = 1LL << 60;
constexpr lint mod = 1000000007;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int t;
    cin >> t;
    vector<lint> a(t), b(t);
    for (int i = 0; i < t; ++i) {
        cin >> a[i] >> b[i];
    }
    for (int i = 0; i < t; ++i) {
        int nb    = 64 - __builtin_clzll(b[i]);
        int tp    = -1;
        lint curr = a[i];

        vector<lint> res;
        for (int j = nb - 1; j >= 0; --j) {
            if ((b[i] & 1LL << j) && !(a[i] & 1LL << j)) {
                tp = j;
                break;
            }
        }
        // assert(tp != -1);
        for (int j = 0; j < tp; ++j) {
            if (a[i] & 1LL << j) {
                a[i] += 1LL << j;
                res.push_back(1LL << j);
            }
        }
        for (int j = tp - 1; j >= 0; --j) {
            if ((b[i] & 1LL << j) && !(a[i] & 1LL << j)) {
                a[i] += 1LL << j;
                res.push_back(1LL << j);
            }
        }
        cout << res.size() << "\n";
        for (auto &r : res) {
            cout << r << " ";
            assert(curr % r == 0);
            curr += r;
        }
        assert(curr == b[i]);
        cout << endl;
    }
    return 0;
}