#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MAX 200003
#define MOD 998244353
#define INF 1000000000

void solve(){
  ll A,B;
  cin>>A>>B;
  vector<ll> a(60),b(60);
  for(int i=0;i<60;i++){
    a[i]=A%2;
    b[i]=B%2;
    A>>=1;
    B>>=1;
  }
  int k;
  for(int i=59;i>=0;i--){
    if(b[i]>a[i]){
      k=i;
      break;
    }
  }
  vector<ll> ans;
  for(int i=0;i<k;i++){
    a[i+1]+=a[i]/2;
    a[i]%=2;
    if(a[i]==1){
      ans.push_back(1LL<<i);
      a[i]=0;
      a[i+1]++;
    }
  }
  for(int i=k-1;i>=0;i--){
    if(b[i]==1){
      ans.push_back(1LL<<i);
    }
  }
  cout<<ans.size()<<'\n';
  for(int i=0;i<ans.size();i++){
    cout<<ans[i]<<" ";
  }
  cout<<'\n';
}

int main(){
  int T;
  cin>>T;
  for(int i=0;i<T;i++){
    solve();
  }
}