/F Was Unexpected At This Time

I’m very new at DOS, so sorry if this is not too bright.

I want to grab strings from one file and compare them to strings in a second file. Then remove strings that match from the second file.

for /F “delims=+” %%x in (%safefile%) DO (
for F/ “delims=+” %%y in (%tmp_keyword_file) DO (
if %%y == %%x change.com “%%y” “”
)
)

I get /F was unexpected at this time.

Help!
Thanks!