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

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        String str1="hello";
        //0--->h
        //1--->e
        //2--->l 
        //3--->l 
        //4--->o
        System.out.println("First letter is :"+str1.charAt(0));
        int length=str1.length();
        System.out.println("length of the string is:"+length);
        System.out.println("Last letter is :"+str1.charAt(length-1));
        System.out.println("First and last letter are:"+str1.charAt(0)+str1.charAt(length-1));
        for(int i=length-1;i>=0;i--){
            System.out.println(str1.charAt(i));
        }
            for(int i=0;i<length;i++){
                System.out.println(str1.charAt(i));
            
    }
}
}