#include<bits/stdc++.h> 
using namespace std;
typedef long long ll;
template<typename T1,typename T2> bool chmin(T1 &a,T2 b){if(a<=b)return 0; a=b; return 1;}
template<typename T1,typename T2> bool chmax(T1 &a,T2 b){if(a>=b)return 0; a=b; return 1;}
ll dx[4]={0,1,-1,0};
ll dy[4]={1,0,0,-1};



signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);


    int q; cin>>q;
    while(q--){
        ll a,b;
        cin>>a>>b;
        vector<ll> ans;
        if(a%2){
            ans.push_back(1);
            a++;
        }
        ll now = 1;
        ll dif = b - a;
        while(dif>=1 && now<62){
            if(dif>=(1LL<<(now-1)) && a%(1LL<<now)){
                ans.push_back(1LL<<(now-1));
                dif -= (1LL<<now-1);
                a += (1LL<<(now-1));
            }
            now++;
        }
        now = 61;
        while(dif){
            if(dif & (1LL<<now)){
                ans.push_back(1LL<<now);
                a += (1LL<<now);
                dif -= (1LL<<now);
            }
            now--;
        }
        cout << ans.size() << "\n";
        for(int i=0;i<ans.size();i++){
            if(i)cout << " ";
            cout << ans[i];
        }
        cout << "\n";
    }

}