can anyone tell me whats wrong here?#Java

import java.io.; import java.util.;

public class Solution {

public static void main(String[] args) {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
    Scanner scanner =new Scanner(System.in);

    while(scanner.hasNextLine()){
        String input=scanner.nextLine();
        //System.out.println(input);

        char dec1=input.charAt(0);
        char dec2=input.charAt(2);
        int last=input.length()-1;
        char lastIndex=input.charAt(last);
        //int lastBefore=last-1;


        StringBuilder result= new StringBuilder();

        if(dec1=='S'){
            for(int i=4;i<input.length();i++){
                char currentChar = input.charAt(i);
                if(Character.isUpperCase(currentChar) && i>0){
                    result.append(" ");
                }
                result.append(currentChar);


            }

            if(dec2=='M' && lastIndex==')'){
                result.delete(result.length()-2, result.length());
                result.toString().toLowerCase();
                System.out.println(result);
            }else if(dec2=='V' && result.toString().contains(" ")){
                int index= result.indexOf(" ");

                if(index<result.length()){
                    //setCharAt(index, character)
                    result.setCharAt(index+1,Character.toLowerCase(result.charAt(index+1)));
                }
                System.out.println(result.toString());
            }else if(dec2=='C' && result.toString().contains(" ")){

                if(result.charAt(0)==' '){
                    result.deleteCharAt(0);
                    System.out.println(result.toString().toLowerCase());
                }else{
                    System.out.println(result.toString().toLowerCase());
                }
            }

            }else{
                StringBuilder newBuild=new StringBuilder(input);

                if(dec2=='V' && newBuild.toString().contains(" ")){
                    newBuild.delete(0,4);
                    for(int i=0; i<newBuild.length();i++){
                        if(newBuild.charAt(i)==' ' && Character.isLowerCase(newBuild.charAt(i+1))){
                            newBuild.deleteCharAt(i);
                            newBuild.setCharAt(i,Character.toUpperCase(newBuild.charAt(i)));
                        }
                    }
                    System.out.println(newBuild.toString());
                }else if(dec2=='C'){
                    newBuild.delete(0,4);
                    if(Character.isLowerCase(newBuild.charAt(0))){
                        newBuild.setCharAt(0,Character.toUpperCase(newBuild.charAt(0)));
                    }
                    for(int i=0; i<newBuild.length()-1;i++){
                        // char ch=newBuild.charAt(i);
                        if(newBuild.charAt(i)==' ' && Character.isLowerCase(newBuild.charAt(i+1))){
                            newBuild.deleteCharAt(i);
                            newBuild.setCharAt(i, Character.toUpperCase(newBuild.charAt(i)));

                        }
                    }
                    System.out.println(newBuild.toString());
                }else if(dec2=='M'&&newBuild.toString().contains(" ")){
                    newBuild.delete(0,4);
                    for(int i=0; i<newBuild.length()-1; i++){
                        if(newBuild.charAt(i)==' ' && Character.isLowerCase(newBuild.charAt(i+1))){
                            newBuild.deleteCharAt(i);
                            newBuild.setCharAt(i, Character.toUpperCase(newBuild.charAt(i)));

                        }
                    }newBuild.append("()");
                    System.out.println(newBuild.toString());
                }

    }

        }


    }

}