fun main(args:Array<String>) {
  val n = readLine()!!.toInt()
  
  val buffs = mutableListOf<String>("an")
  (1..n-1).map { 
    buffs.add( "a%.8fa".format(Math.random()).replace("0.", "") )
  }
  buffs.reversed().joinToString("\n").run(::println)
}