#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: lijinkai
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/