#include <stdio.h>
#include <vector>

std::vector<long long int>ans;
std::vector<int> V1,V2;
long long int power(long long int a, int b)
{
	long long int ans = 1;
	for(int i=1;i<=b;i++) ans*=a;
	return ans;
}
int main()
{
	int T;
	scanf("%d",&T);
	while(T--)
	{
		ans.clear();
		V1.clear();
		V2.clear();
		long long int a,b;
		scanf("%lld%lld",&a,&b);
		V1.push_back(0);
		V2.push_back(0);
		for(int i=1;i<=60;i++)
		{
			V1.push_back(a%2);
			a/=2;
		}
		for(int i=1;i<=60;i++)
		{
			V2.push_back(b%2);
			b/=2;
		}
		for(int i=60;i>=1;i--)
		{
			if(V2[i]==1&&V1[i]==0)
			{
				for(int j=1;j<i;j++)
				{
					V1[j+1] += (V1[j]/2);
					V1[j] %= 2;
					if(V1[j]==1)
					{
						ans.push_back(power(2,j-1));
						V1[j]++;
					}
					V1[j+1] += (V1[j]/2);
					V1[j] %= 2;
				}
				if(V1[i]==0) ans.push_back(power(2,i-1));
				for(int j=i-1;j>=1;j--) if(V2[j]==1) ans.push_back(power(2,j-1));
				break;
			}
		}
		printf("%d\n",ans.size());
		for(int i=0;i<ans.size();i++) printf("%lld ",ans[i]);
		printf("\n");
	}
}