object Solution {

  def groupAnagrams(strs:List[String]):Iterable[List[String]] = {

    //write your code here 

    val res = scala.collection.mutable.Map[List[Int], List[String]]()

    res.values

  }

​

​

}

object Solution {

  def validateStackSequences(pushed: Array[Int], popped: Array[Int]): Boolean = { 

    // write your code here

    true

  }

}