Permutation of words

Question

Can someone give the code of permutation of words? For example input is "Bill Gates" and output is "Gates Bill"

Answer 1

https://code.sololearn.com/cjG9nKCMuPJa/?ref=app

Answer 2

https://code.sololearn.com/cmdm8sx75201/?ref=app in java

Answer 3

but this is not permutation.. it would be like GTAES TGAES ATGES EGTSA .....