PHP, 221 Bytes
I hope it is difficult enough.
Regex (PCRE): 16 Bytes
^[^\s/\#6]{221}$ No space, No comments, no use of base64_decode. Have Fun.
Output
1 2 3 4 8 7 6 5 9 10 11 12 16 15 14 13 Jörg Hülsermann
- 13.4k
- 3
- 16
- 36