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Ah, then insert this line after the [anyway?] line:
/^...[mate].$/d
You see, what in "holed" that doesn't exist in "hello" and "world"? I picked the fourth character, which is 'e'. Add some random characters (m, a, and t) and enclose in square brackets to make them a range of forbidden characters in 4th pos (d after the last slash is the delete command). And remember, . (dot) is represent any character (in that position).
Fun, indeed. :)
Peace always,
<jdenny>
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yups.. Jdenny's own Hello World (tested on slackware current)..
Code:
sed '
/^[why]/!d
/[do]$/!d
/^..[real]..$/!d
/^.[code,]/!d
/^..[anyway?]..$/d
/^...[mate].$/d
' /usr/share/dict/words
hello
world
