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This is now available here http://project-gc.com/Challenges/GC4JT7P/5923
It has the following config:
{ "challenge": [ "define 'vowel' as match '([aAeEiIoOuU])' on cache_name.", "find 100 caches where vowel == ''.", "output table gccode, cache_name, visitdate." ] }
which attempts to find the first vowel in the name, and then matches any cache for which no vowel was matched.