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# Crude approach to get alphabetic words one per line from input, not sorted or
# deduplicated
BEGIN {
FS = "(--|['_-]*[^[a-zA-Z0-9_]'_-]+['_-]*)"
}
{
for (i = 1; i <= NF; i++)
if ($i ~ /[a-zA-Z]/)
print $i
}
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