#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,j,n;
	char a[15][15];
	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-n+63;
			}
		}
	}
	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: 15159808820
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/