import java.util.Random;
import java.util.Scanner;

public class Sample {
	public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int num = scan.nextInt();
        for(int i=0;i<num-1;i++) {
            System.out.println("a"+getRandomStr(10)+"a");
        }
        System.out.println("a"+getRandomStr(10)+"n");
    }

    static String getRandomStr(int num) {
    	String s = "";
    	for(int i=0;i<num;i++) {
            int value = new Random().nextInt(26) + 97;
            char c = (char) value;
            s += c;
    	}
    	return s;
    }
}