#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    int T; cin >> T;
    rep(_,T) {
        ll A,B; cin >> A >> B;
        vector<ll> ans;
        while(A < B) {
            for(ll i = 60; i >= 0; i--) {
                ll P2 = (1LL << i);
                if(A % P2 == 0 && A + P2 <= B) {
                    A += P2;
                    ans.push_back(P2);
                    break;
                }
            }
        }

        cout << ans.size() << "\n";
        for(ll a : ans) cout << a << " "; cout << "\n";
    }
}