Use of uninitialized value in numeric ne (!=) at w.pl line 8.
Argument "Hi" isn't numeric in numeric ne (!=) at w.pl line 8.
Use of uninitialized value in numeric ne (!=) at w.pl line 9.
Argument "" isn't numeric in numeric ne (!=) at w.pl line 9.
Use of uninitialized value in numeric ne (!=) at w.pl line 10.
Use of uninitialized value in numeric ne (!=) at w.pl line 11.
$number is defined