import java.util.*;

public class LoopExercise3 {
  static Scanner scanner = new Scanner(System.in);

  public static void main(String args[]) {
    int x = 0;
    System.out.print("Please enter amount : ");
    x = scanner.nextInt();
    for (int i = 1; i <= x; i += 1) {
      System.out.println("abc" + i);
    }
  }
}