/etc/Crack/rules.suffixu is in crack-common 5.0a-9.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | <*!?Au$0
<*!?Au$1
<*!?Au$2
<*!?Au$3
<*!?Au$4
<*!?Au$5
<*!?Au$6
<*!?Au$7
<*!?Au$8
<*!?Au$9
<*!?Au$!
<*!?Au$.
<*!?Au$?
<*!?Au$ :
# trailing colon (no-op) on last line delimits space character.
|