Thanks for all your replies, it looks like that people here at perlmonks.org really like to help beginners like me :) Well i've benchmarked all the suggestions, and the faster is chromatic's suggestion. 
 four: 24 wallclock secs (20.96 usr +  2.30 sys = 23.26 CPU)
  one: 30 wallclock secs (28.59 usr +  1.79 sys = 30.38 CPU)
three: 22 wallclock secs (19.01 usr +  2.29 sys = 21.30 CPU)
  two: 15 wallclock secs (13.54 usr +  1.72 sys = 15.26 CPU)

[download]
one: my original code two: chromatic's code three: turnstep's code four: turnstep's code, using merlyn's way to print

In reply to Re: Wordlist maker by Anonymous Monk
in thread Wordlist maker by Anonymous Monk

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