$[: 100  -1: f  $#: f
$[: 1  -1: f  $#: f
$[: 0  -1: f  $#: f
$[: -1  -1: f  $#: f
$[: -6  -1: f  $#: f
$[: -7  -1: f  $#: e
$[: -11  -1: f  $#: a
Use of uninitialized value in print at -e line 1.
$[: -12  -1: f  $#:
Use of uninitialized value in print at -e line 1.
$[: -99  -1: f  $#: