#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

#include <atcoder/all>
using namespace atcoder;

#define REP(i, n) for(int i = 0; i < (int)n; i++)
#define LREP(i, n) for(LL i = 0; i < (LL)n; i++)
#define RREP(i, n) for(int i = (int)n-1; i >= 0; i--)
#define V(T) vector<T>

#define P pair<int, int>
#define LP pair<LL, LL>
#define T3 tuple<LL, LL, LL>
#define T4 tuple<LL, LL, LL, LL>
#define INF 1000000007
#define SIZE 500100
#define MOD 998244353
typedef long long LL;

int main() {
	int T;
	cin >> T;
	REP(t, T) {
		LL A, B;
		cin >> A >> B;

		V(LL) C;
		while (A < B) {
			LL bit = A & -A;
			LL D = B - A;
			if (D >= bit) {
				A += bit;
			}
			else {
				LREP(i, 60) {
					if (D & ((LL)1 << i)) bit = (LL)1 << i;
				}
				A += bit;
			}
			C.push_back(bit);
		}

		cout << C.size() << endl;
		REP(i, C.size()) {
			if (i) cout << " ";
			cout << C[i];
			if (i + 1 == C.size()) cout << endl;
		}
	}
}