gistfile1.txt

object Day6 extends Challenge {
  val lines = loadFile("day6.txt").getLines().toList.transpose.map(groupByChars)

  override def runFirst(): Unit = {
    println(lines.map(_.maxBy(_._2)._1).mkString)
  }

  override def runSecond(): Unit = {
    println(lines.map(_.minBy(_._2)._1).mkString)
  }

  def groupByChars(list: List[Char]) = list.groupBy(identity).mapValues(_.size)
}