a : Matched an a
Argument "z" isn't numeric in smart match at C:\b\perlmonks\switch.pl line 7.
z : Matched nothing
5 : Matched 2 through 5
6 : Matched 6 through 10
7 : Matched 6 through 10
8 : Matched 6 through 10
9 : Matched 6 through 10
10 : Matched 6 through 10
11 : Matched nothing