#include <stdio.h>
int main(){
int test,i,n,k;
scanf("%d", &test);
while(test--){
scanf("%d %d",&n,&k);
if(k > (n/2))
printf("-1\n");
else if(k==1 && n==1)
printf("1\n");
else{
for(i=1; i<=k ;i++)
printf("%d ", 2*i);
printf("\n");
}
}
return 0;
}
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