//@formatter:off #include #define rep(i,n) for (int i = 0; i < int(n); ++i) #define rrep(i,n) for (int i = int(n)-1; i >= 0; i--) #define rep2(i,s,n) for (int i = int(s); i < int(n); ++i) #define all(a) a.begin(),a.end() #define rall(a) a.rbegin(),a.rend() #define pb push_back #define eb emplace_back #define vi vector #define vvi vector> #define vl vector #define vvl vector> #define vd vector #define vvd vector> #define vs vector #define vc vector #define vvc vector> #define vb vector #define vvb vector> #define vp vector

#define vvp vector> using namespace std; using ll = long long; using P = pair; using LP = pair; template istream& operator>>(istream &is,pair &p) { return is >> p.first >> p.second; } template ostream& operator<<(ostream &os,const pair &p) { return os<<'{'< istream& operator>>(istream &is,vector &v) { for(T &t:v){is>>t;} return is; } template ostream& operator<<(ostream &os,const vector &v) { os<<'[';rep(i,v.size())os< bool chmin(T& a,T b) {if(a > b){a = b; return true;} return false;} template bool chmax(T& a,T b) {if(a < b){a = b; return true;} return false;} const int inf = 1001001001; const ll linf = 1001001001001001001; //@formatter:on void solve() { ll a, b; cin >> a >> b; ll d = b - a; int mx; rrep(i, 60) { if (d >> i & 1) { mx = i; break; } } int cnt = 0; ll na = a; while (~na & 1) { na /= 2; cnt++; } vl ans; while (cnt < mx) { ans.pb(1LL << cnt); d -= 1LL << cnt; cnt++; } rrep(i, 60) { if (d >> i & 1) { ans.pb(1LL << i); } } cout << ans.size() << '\n'; rep(i, ans.size()) cout << ans[i] << (i < ans.size() - 1 ? " " : ""); cout << '\n'; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr); int t; cin >> t; rep(i, t) solve(); }