//https://www.facebook.com/ratnadeep.pragwalit/posts/2791513361130320 //Submitted by Ratnadeep Ghosh import java.io.*; import java.util.*; import java.text.*; import java.math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.print(in.next().substring(in.nextInt(),in.nextInt())); } }