#include<iostream>
#include<vector>
using namespace std;
int T;
main()
{
	cin>>T;
	for(;T--;)
	{
		long A,B;cin>>A>>B;
		vector<long>X;
		while(A<B)
		{
			long t=1;
			while(A+t*2<=B&&A%(t*2)==0)t*=2;
			A+=t;
			X.push_back(t);
		}
		cout<<X.size()<<endl;
		for(int i=0;i<X.size();i++)cout<<X[i]<<(i+1==X.size()?"\n":" ");
	}
}