C:\>trash 3 3


entering, $_[0] is 3
entering, $_[1] is 3
not returning : $_[1] is 2

entering, $_[0] is 3
entering, $_[1] is 2
not returning : $_[1] is 1

entering, $_[0] is 3
entering, $_[1] is 1
3rd -- returning 2
$_[1] is 2 $_[1] is 2

entering, $_[0] is 2
entering, $_[1] is 2
not returning : $_[1] is 1

entering, $_[0] is 2
entering, $_[1] is 1
3rd -- returning 2
$_[1] is 2 $_[1] is 2

entering, $_[0] is 1
entering, $_[1] is 2
not returning : $_[1] is 1

entering, $_[0] is 1
entering, $_[1] is 1
3rd -- returning 2
$_[1] is 2 $_[1] is 2

entering, $_[0] is 0
entering, $_[1] is 2
2nd -- returning 2*$_[1] (
$_[1] is 4 $_[1] is 4

entering, $_[0] is -1
entering, $_[1] is 4
not returning : $_[1] is 3

entering, $_[0] is -1
entering, $_[1] is 3
not returning : $_[1] is 2

entering, $_[0] is -1
entering, $_[1] is 2
not returning : $_[1] is 1

entering, $_[0] is -1
entering, $_[1] is 1
3rd -- returning 2
$_[1] is 2 $_[1] is 2

entering, $_[0] is -2
entering, $_[1] is 2
not returning : $_[1] is 1