#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
template<class T> inline bool chmax(T&a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T&a,T b){if(a>b){a=b;return 1;}return 0;}
using ll = long long;

ll t,a,b,idx,l=1;   

vector<ll> solve(ll a, ll b){
    vector<ll> ret(1);
    while(l*2<b) l*=2, idx++;
    while(a!=l) ret.push_back(a&-a), a+=(a&-a), ret[0]++;
    for(ll i=idx-1;i>=0;i--)if(b & ll(1)<<i) ret.push_back(ll(1)<<i), ret[0]++;
    return ret;
}

int main () {
    cin.tie(0); ios::sync_with_stdio(false); 

   cin >> t;
   while(t--){
       cin >> a >> b;
       for(auto ans : solve(a,b)) cout << ans << endl;
    }
}