O1. Password Reset / FinalExam - O4

package FinalExam.O4;

import java.util.Scanner;

public class O1PasswordReset {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder input = new StringBuilder(scanner.nextLine());
        String command = scanner.nextLine();

        while (!"Done".equals(command)) {
            String[] type = command.split("\\s+");
            switch (type[0]) {
                case "TakeOdd":
                    StringBuilder test = new StringBuilder();
                    for (int i = 0; i < input.length(); i++) {
                        if (i % 2 > 0) {
                            test.append(input.charAt(i));
                        }
                    }
                    input = new StringBuilder(test);
                    System.out.println(input);
                    break;
                case "Cut":
                    int from = Integer.parseInt(type[1]);
                    int to = Integer.parseInt(type[2]);
                    input.delete(from, from + to);
                    System.out.println(input);
                    break;
                case "Substitute":
                    if (input.toString().contains(type[1])) {
                        input = new StringBuilder(input.toString().replace(type[1], type[2]));
                        System.out.println(input);
                    } else {
                        System.out.println("Nothing to replace!");
                    }
                    break;
            }
            command = scanner.nextLine();
        }
        System.out.println("Your password is: " + input);
    }
}