print BackSlashed('test folder'); # expected test40folder

print BackSlashed('test тестовая folder');
# expected test4032120232026532120132120232027632026232026032121740folder

print BackSlashed('НОВАЯ ПАПКА');
# expected 32023532023632022232022032025740320237320220320237320232320220

sub BackSlashed() {
my $str = shift;
.. backslashed code here...
return $str
}