function treasure(arr) {
  let chest = arr.shift().split("|");
  let command = arr.shift();
  let steal = [];
  let counter = 0;
  while (command != "Yohoho!") {
    let tokens = command.split(" ");
    let action = tokens.shift();
    if (action == "Loot") {
      let treasureToLoot = tokens.slice(0);
      for (let treasure of treasureToLoot) {
        if (!chest.includes(treasure)) {
          chest.unshift(treasure);
        }
      }
    } else if (action == "Drop") {
      let idx = Number(tokens[0]);
      if (idx >= 0 && idx < chest.length) {
        let theLoot = chest.splice(idx, 1);
        chest.push(theLoot);
      }
    } else if (action == "Steal") {
      let count = Number(tokens[0]);
      if (count > chest.length + 1) {
        steal = chest;
        chest = [];                             //point 3
        //console.log(steal);                   //point 3
      } else {
        steal = chest.splice(-count,);
      }
      console.log(steal.join(", "));            //point 1
      steal = [];                               //point 2
    }
    //console.log(steal.join(", "));            //point 1
    command = arr.shift();
  }
  if (chest.length == 0) {
    console.log("Failed treasure hunt.");
  } else {
    for (let el of chest) {
      for (let i = 0; i < el.length; i++) {
        counter++;
      }
    }
    console.log(`Average treasure gain: ${(counter / chest.length).toFixed(2)} pirate credits.`)
  }
}