export function groupAnagrams(words: string[]): string[][] {
  const result = []
  const wordOrdered = words.sort();
  wordOrdered.forEach(word => {
    const index = result.findIndex(array => array.some(w =>  w.split('').sort().join() === word.split('').sort().join()))
    if(index != -1){
      result[index].push(word)
    } else {
      result.push([word])
    }
    
  })
 
  return result;
}