Create a program that PING a list of IPs

[snippsat]

You have saved file with BOM (Byte-order mark)
This is text editor that you use that dos this.
In plain notepad choose all files and utf-8,now save as ip2.txt.

Notepad ++ is okay for quick editing of files.
Under format is it give a clear message what's used when save a file Use UTF-8(without BOM(Byte-order mark)).