#include<cstdio>
using namespace std;
char a[10000]={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
int b;
int main(){
	scanf("%d",&b);
	for(int i=0;i<b;++i){
		for(int y=0;y<b;++y){
			printf("%c",a[y+i]);
		}
		a[26+i]=a[i];
		printf("\n");
	}
	return 0;
}