#include<stdio.h>
int main()
{
	int t;
	scanf("%d", &t);
	long long int a, b, c;
	long long int k, ans[150];
	for (; t > 0; t--)
	{
		scanf("%lld %lld", &a, &b);
		k = 0;
		while (a < b)
		{
			c = 1;
			while (a % (2 * c) == 0)
				c *= 2;
			while (a + c > b)
				c /= 2;
			ans[k] = c;
			k++;
			a += c;
		}
		printf("%lld\n", k);
		for (c = 0; c < k - 1; c++)
			printf("%lld ", ans[c]);
		printf("%lld\n", ans[k - 1]);
	}
	return 0;
}