text: // JavaScript - Node v8.1.3
  
  const correctPolishLetters = string => {
      let from = 'ąćęłńóśźż';
      let to   = 'acelnoszz';
      return Array.from(string).map(c => (from.indexOf(c) !== -1) ? to[from.indexOf(c)] : c).join('');
  }
  