#include <bits/stdc++.h>
using namespace std;
 
#define fi first
#define se second
#define pb push_back
using vi = vector <int>;
using ll = long long;
using pii = pair <int, int>;
const ll mod = 998244353;
//~ const ll mod = 1e9 + 7;
ll qpow(ll a, ll b, ll m = mod) { ll r = 1, t = a;
	for(; b; b /= 2) { if(b & 1) r = r * t % m; t = t * t % m; } return r; }

ll lb(ll x) { return x & (-x); }
ll hb(ll x) { return 1LL << (63 - __builtin_clzll(x)); }

int main() {
	ios :: sync_with_stdio(false);
	int T; cin >> T;
	while(T --) {
		ll a, b; cin >> a >> b;
		vector <ll> ans;
		
		while(a + lb(a) <= b) {
			ans.pb(lb(a));
			a += lb(a);
		}
		
		while(a < b) {
			ll x = hb(b - a);
			ans.pb(x);
			a += x;
		}
		
		cout << ans.size() << '\n';
		for(ll x : ans) cout << x << ' '; cout << '\n';
	}
}