permutation of a string/word - good solutions?

[gingerfish]

Hi,

I have a question of how to tackle following task:

A string/word, e.g. ‘ABC’, needs to be displayed with all its permutations.
So from ‘ABC’ it would get me
‘ABC’, ‘ACB’, ‘BAC’, BCA’, ‘CAB’, CBA’.

What is the best way of doing that?
I was thinking of an array holding four variables, one for counting and three for A B C. But then I’m not quite sure about how the loop needs to be.

Any help is much appreciated.

Thanks a lot,
Gingerfish