#include<bits/stdc++.h>
using namespace std;
char a[105]={"0ABCDEFGHIJKLMNOPQRSTUVWXYZ0ABCDEFGHIJKLMNOPQRSTUVWXYZ0ABCDEFGHIJKLMNOPQRSTUVWXYZ"};
int main(){
long long n;
cin>>n;
for(int i=1;i<=n;i++){
for(long long j=1;j<=n;j++){
cout<<a[j%26+i-1];
}
cout<<"\n";
}
return 0;
}