i i i i i i i       ooooo    o        ooooooo   ooooo   ooooo
  I I I I I I I      8     8   8           8     8     o  8    8
  I  \ `+' /  I      8         8           8     8        8    8
   \  `-+-'  /       8         8           8      ooooo   8oooo
    `-__|__-'        8         8           8           8  8
        |            8     o   8           8     o     8  8
  ------+------       ooooo    8oooooo  ooo8ooo   ooooo   8

Welcome to GNU CLISP 2.49 (2010-07-07) <http://clisp.cons.org/>

Copyright (c) Bruno Haible, Michael Stoll 1992, 1993
Copyright (c) Bruno Haible, Marcus Daniels 1994-1997
Copyright (c) Bruno Haible, Pierpaolo Bernardi, Sam Steingold 1998
Copyright (c) Bruno Haible, Sam Steingold 1999-2000
Copyright (c) Sam Steingold, Bruno Haible 2001-2010

Type :h and hit Enter for context help.

[1]> (load "lp.lsp")
;; Loading file lp.lsp ...
;; Loaded file lp.lsp
T
[2]> (random-permutation '(a b c d e))
(B D E C A)
[3]> (random-permutation '())
NIL
[4]> (random-permutation '(1))
(1)
[5]> (random-permutation '(1 2))
(2 1)
[6]> (random-permutation '(1 2 3 4 5 6 7 8 9 10))
(10 5 6 9 7 4 2 8 1 3)
[7]> (trace random-permutation )
;; Tracing function RANDOM-PERMUTATION.
(RANDOM-PERMUTATION)
[8]> (random-permutation '(a 1 b 2 c 3))
1. Trace: (RANDOM-PERMUTATION '(A 1 B 2 C 3))
2. Trace: (RANDOM-PERMUTATION '(1 B 2 C 3))
3. Trace: (RANDOM-PERMUTATION '(1 2 C 3))
4. Trace: (RANDOM-PERMUTATION '(1 2 C))
5. Trace: (RANDOM-PERMUTATION '(1 2))
6. Trace: (RANDOM-PERMUTATION '(2))
7. Trace: (RANDOM-PERMUTATION 'NIL)
7. Trace: RANDOM-PERMUTATION ==> NIL
6. Trace: RANDOM-PERMUTATION ==> (2)
5. Trace: RANDOM-PERMUTATION ==> (1 2)
4. Trace: RANDOM-PERMUTATION ==> (C 1 2)
3. Trace: RANDOM-PERMUTATION ==> (3 C 1 2)
2. Trace: RANDOM-PERMUTATION ==> (B 3 C 1 2)
1. Trace: RANDOM-PERMUTATION ==> (A B 3 C 1 2)
(A B 3 C 1 2)
[8]> (bye)
Bye.