package FinalExam;

import java.util.Scanner;

public class FirstUsername {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);


        String userName = scanner.nextLine();
        String input = scanner.nextLine();

        while (!input.equals("Sing up")){

            String[] token = input.split(" ");
            String command = token[0];

            switch (command){
                case  "Case":
                    String lowerOrUpper = token[1];
                    if (lowerOrUpper.equals("lower")){
                        userName=userName.toLowerCase();
                        System.out.println(userName);
                    }else if (lowerOrUpper.equals("upper")){
                        userName=userName.toUpperCase();
                        System.out.println(userName);
                    }
                    break;
                case  "Reverse":
                    int startIndex = Integer.parseInt(token[1]);
                    int endIndex = Integer.parseInt(token[2]);

                    if (startIndex>=0&&endIndex<=userName.length()-1&&endIndex>startIndex) {

                       String printString = userName.substring(startIndex, endIndex + 1);
                        StringBuilder printString1 = new StringBuilder();

                        printString1.append(printString);
                        printString1.reverse();

                        System.out.println(printString1);
                    }
                    break;
                case  "Cut":
                    String substring = token[1];
                    if (userName.contains(substring)) {
                        int indexOf = userName.indexOf(substring);
                        userName = userName.substring(0, indexOf)
                                + userName.substring(indexOf + substring.length(), userName.length());
                        System.out.println(userName);
                    } else {
                        System.out.printf("The word %s doesn't contain %S.%n",userName,substring);
                    }

                    break;
                case  "Replace":
                    String charString = token[1];
                    userName=userName.replaceAll(charString,"*");
                    System.out.println(userName);
                    break;
                case  "Check":
                    charString=token[1];
                    if (userName.contains(charString)){
                        System.out.println("Valid");
                    } else {
                        System.out.printf("Your username must contain %s.%n",charString);
                    }
                    break;
            }




            input= scanner.nextLine();
        }
    }
}