checking if two strings are anagrams

areAnagrams.scala

def areAnagrams(first: String, second: String) = {
  
  (first, second) match {
    case x if first.length != second.length => false
    case _ => {
      val firstGroup = first.groupBy(i => i).map { case (item, repetitions) => (item, repetitions.size) }
      val secondGroup = second.groupBy(i => i).map { case (item, repetitions) => (item, repetitions.size) }
      
      firstGroup.size == secondGroup.size &&
        firstGroup.forall(item => item._2 == secondGroup.getOrElse(item._1, 0))
    }
  }
}

println(areAnagrams("FRIED", "FIRED")) // TRUE
println(areAnagrams("SPEECH", "SPIECH")) // FALSE