#include<bits/stdc++.h>
using namespace std;
int n,i,j;
int main(){ 
	char a[10][10];
	cin>>n;
	for(i=1;i<=n;i++){
		for(j=1;j<=n;j++){
			if(i+j<=n+1){
				a[i][j]=i+j+63;
			}else{
				a[i][j]=i+j+63-n;
			} 
		}
	}
	for(i=1;i<=n;i++){
		for(j=1;j<=n;j++){
			cout<<setw(3)<<a[i][j];
	    }
	    cout<<endl;
	}		
	return 0;
}

/**************************************************************
	Problem: 1194
	User: zhenghaoxuan
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/