function compressString(text: string): string {

  const countingLetters: Record<string, number> = {};
  let compressedString = '';

  [...text].forEach( letter => countingLetters[letter] ? countingLetters[letter]++ : countingLetters[letter] = 1);

  for( const [letter, count] of Object.entries(countingLetters)) {
    compressedString += letter + count;
  }

  return compressedString;
}

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