#include<bits/stdc++.h>
using namespace std;
int n,i,j;
char a[12][12];
int main(){
	cin>>n;
	for(i=1;i<=n;i++){
		for(j=1;j<=n+1-i;j++){
			if(i+j<=n+1){
				a[i][j]=i+j+63;
			}
			else{
				a[i][j]=i+j+58;
			}
		}
	}
	for(i=1;i<=n;i++){
		for(j=1;j<=n;j++){
			cout<<setw(3)<<a[i][j];
		}
		cout<<endl;
	}
} 
/**************************************************************
	Problem: 1194
	User: zengyixuan
	Language: C++
	Result: Wrong Answer
****************************************************************/