베어로보틱스

function StringChallenge(str) { 

  // code goes here
  const map = {'zero':'0','one':'1','two':'2','three':'3','four':'4','five':'5','six':'6','seven':'7','eight':'8','nine':'9'}
  const map2 = {'plus':'+','minus':'-'}
  const map3 = {'0':'zero','1':'one','2':'two','3':'three','4':'four','5':'five','6':'six','7':'seven','8':'eight','9':'nine','-':'negative'}
  let answer = "";
  let number = "";
  let symbol = "";
  let result = 0;
  let resultAnswer = ""
  for(let i=0; i<str.length; i++){
    number += str[i]
    if(map[number]){
      answer += map[number]
      number = ""
    } else if(map2[number]){
      answer += map2[number];
       symbol = map2[number];
      number = ""
    }
  }
   let resultArr = answer.split(symbol);
      if(symbol==='+'){
        result = (+resultArr[0])+(+resultArr[1]);
     }
      else if(symbol==='-'){
        result = (+resultArr[0])-(+resultArr[1]);
     }
  for(let i=0; i<String(result).length; i++){
    if(map3[String(result)[i]]){
      resultAnswer += map3[String(result)[i]];
    }
  }
  return resultAnswer
}