AoC day 6

import scala.io.Source

object day6 extends App {

  val input = Source.fromFile("day6.txt").getLines.toList
  println((input.transpose map (x => x.groupBy(identity).mapValues(_.size).maxBy(_._2)._1)).mkString)
  println((input.transpose map (x => x.groupBy(identity).mapValues(_.size).minBy(_._2)._1)).mkString)

}