0. @list = a b c
1. @list = 3
2. @r = cba
$#r = 0
@list = abc
3. @r = cba
$#r = 2
@list = abc
4. $r = 3
5. @list = a b c
$#list = 2
6. @list = cba
$#list = 2
7. @list = 3
@list = abc
$#list = 2
8. cba
@list = abc
$#list = 2
9.
3
@list = a b c
$#list = 2
10.
c b a
@list = a b c
$#list = 2