Thanks. That's odd. Maybe I kept glancing back at the decimal one they give first. I even ended up doing stuff like for n in '' -n; do for a in '' ' ';

Thanks. That's odd. Maybe I kept glancing back at the decimal one they give first. I even ended up doing stuff like for n in '' -n; do for a in '' ' '; do for b in '' ' '; do echo $n "${a}ABC$b" | sha1sum; done; done; done to try and get the output they give for http://www63.wolframalpha.com/input/?i=SHA+ABC http://www63.wolframalpha.com/input/?i=SHA+ABC and thought I hadn't managed it.