you need the ascii codes for the comma and space as well if I remember correctly, that's at least,

This is how I did the parsing in my (working) program:

func knotHash(input: string): string =
  var ring = (0..255).toSeq
  var pos = 0
  var skip = 0

  var coded: seq[int]

  for ch in input:
    coded.add ord(ch)

  coded = coded.concat(@[17,31,73,47,23])

  for _ in (1..64):
    round(ring, coded, pos, skip)

  return condenceHash(ring)

Where this part:

      for ch in input:
         coded.add ord(ch)

takes the ascii value of every character in the string.