public class T_1219_Symbolic_Sequence {
public static void main(String[] args) {
PrintWriter pw= new PrintWriter(new OutputStreamWriter(System.out));
Random r= new Random();    char a[]=new char[30];    int k = 0 ;
  for (char j ='a'; j <='z'; j++)
     a[++k]=j;
    for (int i = 1; i <=1000000; i++)
        pw.print(a[r.nextInt(26)+1]);
    pw.close();
}
}