That does not work. It has the same effect as commenting out the "use open" line. Try it in an UTF-8 terminal with LC_CTYPE set properly to utf-8. The print to STDOUT corrupts the character.
I read a line, that is 1 chars long.
That line is: �
That line in ascii is: o
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Want more info? How to link or
or How to display code and escape characters
are good places to start.