function uniqueWords(text: string): string[] {
  if(text === "") return [];

  let words = text.split(' ');
  let wordCount:Record<string, number> = {};
  
  for(let i = 0; i < words.length; i++) {
    !wordCount[words[i].toLowerCase()]? wordCount[words[i].toLowerCase()] = 1 : wordCount[words[i].toLowerCase()] += 1;
  }

  const uniqueWords:string[] = []

  for(const [key,value] of Object.entries(wordCount)) {
    if(value === 1){
      uniqueWords.push(key)
    }
  }

  return uniqueWords;
}

// Do not modify: needed to evaluate the result.
export { uniqueWords };