#include<stdio.h> 
int main() 
{
    int N;
    scanf("%d",&N);
    while(N--){
        int n; 
        scanf("%d",&n);
        n=2*n+1;
        int i,j,k;
        char count='A'-1;
        for(i=1;i<=(n+1)/2;i++)
        {
            for( j=1;j<=(n+1)/2-i;j++)
            {
                printf(" ");
            }
            for( k=1;k<=2*i-1;k++)
            {
            	if(k<=i)
            	{
					count++;
                	printf("%c",count);
				}
				else if(k>=i+1)
				{
					count--;
					printf("%c",count);
				}
            }
            count='A'-1;
            printf("\n");
        }
        for(i=(n+1)/2+1;i<=n;i++)
        {
            for( j=1;j<=i-(n+1)/2;j++)
            {
                printf(" ");
            }
            for( k=1;k<=2*(n+1-i)-1;k++)
            {
                if(k<=n-i+1)
			 	{
					count++;
				    printf("%c",count);
				}
				else if(k>=n-i+2)
				{
					count--;
					printf("%c",count);
				}
            }
        printf("\n");
        count='A'-1;
		}
    }
}

#include <stdio.h> int m[100][100]; //pand函数负责单项运算输出，主函数负责循环 void pand () { //进行标记 int n,M,N,i,j,J; char a; scanf ("%d",&M); n=M+1; N=2*M+1; J=M+1; for (i=1;i<=N;i++) { for (j=J;j<=N-J+1;j++) { m[j][i]=1; } if (i<=M) J--; else J++; } //输出 for (i=1;i<=N;i++) { //A，B，C......的ASCII值相邻 ，故在char时A+1=B； a='A'; for (j=1;j<=N;j++) { if (m[j][i]==1) { printf ("%c",a); if (j<=M) a++; else a--; } else printf (" "); } printf ("\n"); } //下面进行数组重置 for (i=1;i<=N;i++) { for (j=1;j<=N;j++) { m[i][j]=0; } } } int main() { int NN,l; scanf ("%d",&NN); for (l=1;l<=NN;l++) { pand (); } return 0; }