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