I run out of ideas, trying to pass test #5. Does anyone can tell me how this test looks like?
Thank you,

There seem to be some non-ASCII characters in the test cases. If the input is loaded byte by byte, then the result should be output byte by byte as well.

I used Rust and handled the bytes as chars, which were stored as 4-byte unicode, but mistakenly output the result by chars instead of bytes.