#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define all(a) a.begin(),a.end()
#define rall(c) (c).rbegin(),(c).rend()
#define mp make_pair
#define endl '\n'
#define vec vector<ll>
#define mat vector<vector<ll> >
#define fi first
#define se second
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
typedef long double ld;
typedef complex<double> comp;
const ll INF=1e9+7;
const ll inf=INF;
const ll MOD=998244353;
const ll mod=MOD;
const int MAX=200010;

signed main(){
    ll t;cin>>t;

    while(t--){
        ll a,b;cin>>a>>b;
        vector<ll>ans(0);
        while(a<b){
            if(a*2<=b){
                ans.pb(a);
                a*=2;
            }else{
                ll cop=a;
                ll cnt=0;
                while(cop%2==0&&(1LL<<(cnt+1))+a<=b){
                    cnt++;
                    cop/=2;
                }
                ans.pb((1LL<<cnt));
                a+=(1LL<<cnt);
            }
        }
        cout<<ans.size()<<endl;
        ll z=0;
        rep(i,ans.size()){
            cout<<ans[i]<<' ';
            //z+=ans[i];
        }
        cout<<endl;
        //cout<<z<<endl;
    }
}