It's not permutations, though the effect may seem very similar. It's only shifting. You just move 1st letter to the end of the string until you get the same string you started with. ..Yet nobody will explain anything to you in simple words here. Some advanced users, the one you've just addressed on top of them, made this forum a circle of mutual admiration and contempt to all with skills beneath theirs. This website stopped serving its purpose long ago.

@AyushBk No one gives a shit about you, either. Thank you.