From: utzoo!decvax!duke!rr@mhb5b.UUCP
Newsgroups: net.jokes
Title: Re: puzzle
Article-I.D.: mhb5b.315
Posted: Mon May  2 23:11:13 1983
Received: Tue May 17 08:12:12 1983
References: ittvax.699, <1269@allegra.UUCP>

Relay-Version:version B 2.10 delta 4/26/83; site burl.UUCP
Posting-Version:version B 3/9/83; site mhb5b.UUCP
Path:burl!spanky!hocda!houxz!houxm!mhuxa!mhb5b!rr
Message-ID:<315@mhb5b.UUCP>
Date:Mon, 2-May-83 23:11:13 EDT
Organization:Bell Labs, Murray Hill

Try the shell script:

d=[qwertyuiop]
grep "^$d$d$d$d$d$d$d$d$d$d\$" /usr/dict/words

This gives: perpetuity, proprietor, repertoire, but not typewriter!