Combinator attack missing correct candidate on large wordlist

[antimatterizer]

Code:

grep build2373 left.txt | xxd -p | tr -d '\n'

and

Code:

grep guitar right.txt | xxd -p | tr -d '\n'

the combined hexadecimal output (maybe just stripping the newline characters \n) must be the same as

Code:

echo -n build2373guitar | xxd -p | tr -d '\n'

I did some checking against my list.  I am a little confused on the order of the pipes you've got.  I understand that xxd -p gives us a plaintext hexdump and tr -d '\n' removes new lines.  If I flip flop those, it should theoretically remove the new line from the end of the grep and then perform hexdump.  I gather that's what we're after.

Results are as follows:

grep build2373 left.txt | tr -d '\n' | xxd -p
6275696c6432333733

grep guitar right.txt | tr -d '\n' | xxd -p
677569746172

echo build2373guitar | tr -d '\n' | xxd -p
6275696c6432333733677569746172

That's correct, no?  To be certain, the new lines are the proper demarcation of words for Hashcat, right?

Thanks again.