Hi, looking at `The Great Computer Language Shootout' mentioned in another thread, I wanted to try if Data.HashTable gives better results than Data.FiniteMap for the spell checker test http://www.bagley.org/~doug/shootout/bench/spellcheck/ I came up with the attached program. With data files http://www.bagley.org/data/shootout/spellcheck/Usr.Dict.Words http://www.bagley.org/data/shootout/spellcheck/Input it yields the result carsten@penne:~/t> ./a.out < Input blooper cager cashmere coming tablespoonful zuul However, the result should be only `zuul'. Is the problem in Data.HashTable? I have tested, 6.0, 6.2, 6.2.20040304. Greetings, Carsten -- Carsten Schultz (2:38, 33:47), FB Mathematik, FU Berlin http://carsten.codimi.de/ PGP/GPG key on the pgp.net key servers, fingerprint on my home page.