text: function rot13(str) {
    const newStr = str
    .split("")
    .map(e => {
      if(!/[A-Z]/.test(e))
        return e
      return String.fromCharCode(
        ((e.charCodeAt(0) - 65) + 13)%26 + 65
      )
    })
    .join("")
    return newStr;
  }
  
  rot13("SERR PBQR PNZC");