#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"; } }