Thapap , So u r a boy.......am sorry for the other day.......... I thought u r a gal...........strange!.. Anyways does not matter but still am sorry ...... when u said that u will help me..From coming Friday I will go deeper into Haskell...so will write to you then...Thanks.....! And r u in Natural Language Processing or logic stuffs....... Well, I read ur posting ....It is a nice read............damn I am still under the impression that u r a gal...... See you soon..............