AT_abc458_a [ABC458A] Chompers

You are given a string $ S $ consisting of lowercase English letters and a positive integer $ N $ . The length of $ S $ is at least $ 2N+1 $ . Find the string obtained by removing $ N $ characters from the beginning and $ N $ characters from the end of $ S $ .

The input is given from Standard Input in the following format: > $ S $ $ N $

Output the answer.

### Sample Explanation 1 Removing the first three characters (`che`) and the last three characters (`apy`) from `chemotherapy` gives `mother`. ### Constraints - $ S $ is a string consisting of lowercase English letters. - $ N $ is an integer. - $ 2N+1 \leq |S| \leq 30 $ - $ 1 \leq N \leq 10 $