package com.swabunga.util;

public class StringUtility {
  public static StringBuffer replace(StringBuffer buf, int start, int end, String text) {
    int len = text.length();
    char[] ch = new char[buf.length() + len - (end - start)];
    buf.getChars(0, start, ch, 0);
    text.getChars(0, len, ch, start);
    buf.getChars(end, buf.length(), ch, start + len);
    buf.setLength(0);
    buf.append(ch);
    return buf;
  }

  public static void main(String[] args) {
    System.out.println(StringUtility.replace(new StringBuffer(args[0]), Integer.parseInt(args[2]), Integer.parseInt(args[3]), args[1]));
  }
}