#include <iostream>
#include <cstdio>
#include <vector>
using namespace std;
vector<int>ans;
int m,k;
int main(){
	freopen("Sequence.in","r",stdin);
	freopen("Sequence.out","w",stdout);
	int T;
	scanf("%d",&T);
	while(T--){
		scanf("%d %d",&m,&k);
		if(m<(1<<k)){
			printf("-1\n");
		}else{
			if(m&1){
				ans.push_back((1<<k)-1);
				m-=(1<<k)-1;
				for(int i=1;i<=30;i++){
					if((m>>i)&1){
						ans.push_back(1<<(i-1));
						ans.push_back(1<<(i-1));
					}
				}
				printf("%d\n",ans.size());
				for(auto v:ans)printf("%d ",v);
				printf("\n");
			}else{
				if(m<(((1<<k)-1)<<1)){
					printf("-1\n");
				}else{
					m-=(((1<<k)-1)<<1);
					ans.push_back(((1<<k)-1)<<1);
					for(int i=1;i<=30;i++){
						if((m>>i)&1){
							ans.push_back(1<<(i-1));
							ans.push_back(1<<(i-1));
						}
					}
					printf("%d\n",ans.size());
					for(auto v:ans)printf("%d ",v);
					printf("\n");
				}
			}
		}
		ans.clear();
	}
	return 0;
}