wordlist/hex generator without repeating letters.
 

Hi Guys

I am not very good at programmming thats why i am addressing this question/task to you gentelmens.Spend ages looking around for something like that and only thing that i could find is crunch2.9 password generator but at the moment it does not suport the function that i am looking for.
My aim is to generate :
10-character combinations of the following characters (lowercase) 23456789abcdef with no more then 3 same letters repeates no metter side by side or within one line (sequence) so lets say

abcdef1234 accept
fabcde1234 accept
ffabcd1234 accept
which is probably permutation with repetable string ( where abc is not equeal to cba etc .so ti speak position does metter)

fffabc1234 not acceptable -----(3 same characters)
ffabcf1234 not acceptable -----( 3 same characters event thought not side by side)

so generally we dont want 3 same characters apper in same line ,
Anybody would kindly challenge that (either linux or mac os scripts)
Thanks for any help and sorry for my bad english,hope you know what i'm looking for.

And what have you done in accepting the challenge? Generally you will get a better response if you show what you have tried and where you feel
you are stuck? I would also ask, how many are you looking to generate at a time? (ie. 1, 5, 100)

Also, if you search LQ you might find what you are looking for, check this out as an option to play with

Thanks grail for your prompt reply.
as i said i am not good at programming and most of those command does not make sense to me plus i am mac os based (can do few simple terminal commands--thats all)Thanks for the link i read it before even post some comments there,and running a clisp script on mac os not an easy task for me either.forgive me if i am asking for too much but i have stuck...
Thanks
p.s. i am looking for all possible combination/permutation.crunch output is just way to big ,so looking for something to narrow it down

Did you look at the awk solution I provided in the link? Should be a fairly simple manipulation to get what you desire.