#include<iostream>
#include<stdio.h>
#include<string>
#include<map>
using namespace std ;

int n ;

void input ( ) {
	cin >> n ;
}

void solve ( ) {
	int i ;

	if ( n == 2 ) {
		cout << "AA\n" ;
		cout << "11\n" ;
		return  ;
	}

	if ( n % 6 != 0 ) {
		cout << "NO\n" ;
		return ;
	}
	for ( i = 0 ; i < n ; i ++ ) cout << "A" ;
	cout << "\n" ;
	cout << "22" ;
	for ( i = 2 ; i < n ; i ++ ) {
		if ( i % 2 == 0 ) cout << "1" ;
		else cout << "2" ;
	}
	cout << "\n" ;
}

int main ( ) {
	input ( ) ;
	solve ( ) ;
	return 0 ;
}
