SOLVE
LATER
Monk loves to play games. On his birthday, his friend gifted him a string $$S$$. Monk and his friend started playing a new game called as Suffix Game. In Suffix Game, Monk's friend will ask him lexicographically $$k^{th}$$ smallest suffix of the string $$S$$. Monk wants to eat the cake first so he asked you to play the game.
Input Format:
First line contains a string $$S$$ ($$1 \le |S| \le 25$$) and an integer $$k$$ ($$1 \le k \le |S|$$).
Output Format:
Print the lexicographically $$k^{th}$$ smallest suffix of the string $$S$$.
Note:
Those who are not familiar with suffix and lexicographical order, can read about it from https://en.wikipedia.org/wiki/Suffix and https://en.wikipedia.org/wiki/Lexicographical_order.
All the suffices of the string are:
aacb
acb
cb
b
After sorting the order of the suffices will be:
aacb
acb
b
cb
$$3^{rd}$$ smallest suffix will be $$b$$.