import java.util.*;
import java.lang.*;
import java.io.*;

class Main {
    public static void main(String[] args) {
        String s = "hello world";
        char[] c = new char[3];
        s.getChars(2, 5, c, 0);
        System.out.println(c); // llo
        
        String s1 = "wane";
        String s2 = "pane";
        System.out.println(s1.regionMatches(1, s2, 1, -1)); // true
        
        System.out.println(s1.indexOf("ane")); // 1
        System.out.println(s1.indexOf("tame")); // -1
        
        System.out.println(s1.substring(1)); // ane
        
        System.out.println(s1.replace("w", "b")); // bane
        
        String s3 = "  hello world ";
        System.out.println(s3.trim().replace("l", "w")); // hewwo worwd
    }
}