AT_abc417_a [ABC417A] A Substring

You are given an $ N $ -character string $ S $ consisting of lowercase English letters. Output the string of $ N-A-B $ characters obtained by removing the first $ A $ characters and the last $ B $ characters from $ S $ .

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

Output the string obtained by removing the first $ A $ characters and the last $ B $ characters from $ S $ .

### Sample Explanation 1 Removing the first one character and the last three characters from `atcoder` gives `tco`. ### Sample Explanation 2 The string to be output may be equal to $ S $ . ### Constraints - $ 1\le N\le20 $ - $ 0\le A $ - $ 0\le B $ - $ A+B\lt N $ - $ S $ is a string of $ N $ characters consisting of lowercase English letters. - $ N $ , $ A $ , and $ B $ are all integers.