#include <bits/stdc++.h>
using namespace std;
using ll = long long;
template <class T> using vec = vector<T>;
template <class T> using vvec = vector<vec<T>>;
template<class T> bool chmin(T& a,T b){if(a>b) {a = b; return true;} return false;}
template<class T> bool chmax(T& a,T b){if(a<b) {a = b; return true;} return false;}
#define all(x) (x).begin(),(x).end()
#define debug(x)  cerr << #x << " = " << (x) << endl;

void solve(){
    ll A,B;
    cin >> A >> B;
    vec<ll> ans;
    if(A%2==1){
        ans.push_back(1);
        A++;
    }
    vec<ll> p = {1,2};
    while(p.size()<60){
        p.push_back(p.back()*2);
        ans.push_back(2);
    }
    int n = p.size();
    int id = n-1;
    B -= A;
    while(B){
        while(B>=p[id]){
            ans.push_back(p[id]);
            B -= p[id];
        }
        id--;
    }
    int m = ans.size();
    assert(m<=120);
    cout << m << "\n";
    for(int i=0;i<m;i++) cout << ans[i] << (i!=m-1? " ":"\n");
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    int T;
    cin >> T;
    while(T--){
        solve();
    }
}