# include<stdio.h> int main() { int t,n,i,j,k; scanf("%d",&n); for(k=1;k<=n;k++) { scanf("%d",&t); for(i=1;i<=t;i++) { for(j=1;j<=t;j++) { if((j==i)||((i+j)==(t+1))) printf("X"); else printf(" "); } printf("\n"); } printf("\n"); } return 0; }