Input (grade 13): Heimdall (Old Norse Heimdallr, the prefix Heim - means home, the affix - dallr is of uncertain origin) is one of the Æsir (gods) in Norse mythology, called the "whitest of the gods" (ON Hvítastr-Ása).
Output (grade 5): Heimdall (or Heimdallr) is one of the gods in Norse mythology.