문장을 입력받아서 첫번째, 두번째 단어를 찾아서 출력하는 프로그램인데요

import java.util.Scanner;
public class Exercise1 {
        public static void main(String[] args) {
                  Scanner input=new Scanner(System.in);
                  String s,word;
                  int position,position2;
                  int i;
                    
                  s=input.nextLine();
                  System.out.println("\""+s+"\"");
                  
                  
                  for(i=0;i<=s.length();i++)
                          if(s.indexOf(i)!=' ')
                                  break;  
                  
                  
                  position=s.indexOf(" ",i);
                    
                  word=s.substring(i,position);
                  System.out.print("is the string \""+word+"\"");
                    
                  position=position+1;
                  position2=s.indexOf(" ",position);
                  word=s.substring(position,position2);
                  System.out.println("and the second word is the string \""+word+"\"");
        }
}

Hello, my good friend! 이런식으로 입력하면 정상적으로 단어를 찾아주는데

    Hello, my good friend! 이렇게 처음에 공백을 주면 단어를 찾지 못합니다..

어디가 잘 못 된걸까요?