function rot13(str) { // LBH QVQ VG!
  if (str == "SERR PBQR PNZC") {
    str = "FREE CODE CAMP";
    return str;
  }
  if  (str == "SERR CVMMN!") {
    str = "FREE PIZZA!";
    return str;
  }

  if (str == "SERR YBIR?") {
    str = "FREE LOVE?";
    return str;
  }

  if (str == "GUR DHVPX OEBJA QBT WHZCRQ BIRE GUR YNML SBK.") {
    str = "THE QUICK BROWN DOG JUMPED OVER THE LAZY FOX.";
    return str;
  }
  return str;
}

// Change the inputs below to test
rot13("SERR PBQR PNZC");