function groupByLength(words: string[]): Record<number, string[]> {
  // Escribe tu solución aquí
  const someObj = {}
  if( words.length < 1 ) return {}
  for ( const word of words ) {
    if ( word.length in someObj ) {
      someObj[word.length].push( word )
      continue
    }
    someObj[Number(word.length)] = [ word ]
  }
  return someObj;
}

// No modificar: necesario para evaluar el resultado.
export { groupByLength };