Code- https://ide.codingblocks.com/s/324299 ques- Move All X at End https://online.codingblocks.com/app/player/54601/content/150095/4879/code-challenge

Code- https://ide.codingblocks.com/s/324299
ques- https://online.codingblocks.com/app/player/54601/content/150095/4879/code-challenge
Move All X at End .

why string terminated as x is encountered in input.
please help me out in giving correct output