How to arrange an array of strings into groups of identical strings that can be obtained by rearranging characters in them?

Question

Algorithms

There is a task on algorithms (translated from English), the text of which is in the question and I cannot understand the essence of the task.

English text.

How to arrange an array of strings into groups of the same strings which can be obtained by permuting characters in them?

Could you give me an example?

Answer 1

Source array:
qwer
asdfgh
zxcvb
qwsd
zxqa
erwq
qrwe
zvxbc To
be grouped like this:
qwer
erwq
qrwe
asdfgh
zxcvb
zvxbc
qwsd
zxqa