Finding dictionary list of 3, 4 and five char words

[foka]

Where can one find all the dictionary words that are 3 or 4 chars.

i.e. any source where you can list the dictionary words by lenght.

 

[foka]

bump

 

[Source]

www.onelook.com

??? for 3 char.
???? for 4 char.
????? for 5 char.

Choose common words only.

 

[foka]

thanks, name maker.