#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

void solve() {
    int T;
    cin >> T;
    rep(ITER, T) {
        vll ans;
        ll A, B;
        cin >> A >> B;
        ll x = 1;
        while (A % (x * 2) == 0) {
            x *= 2;
        }
        while (A + x <= B) {
            if (A % (x * 2)) {
                ans.push_back(x);
                A += x;
            }
            x *= 2;
        }
        while (A < B) {
            if (A + x <= B) {
                ans.push_back(x);
                A += x;
            } else {
                x /= 2;
            }
        }
        cout << sz(ans) << endl;
        rep(i, sz(ans)) {
            cout << ans[i] << (i == sz(ans) - 1 ? '\n' : ' ');
        }
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(15);
    solve();
    return 0;
}