package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String username = sc.nextLine();
        String input = sc.nextLine();

        while (!input.equals("Sign up")) {
            String[] inputArray = input.split("\\s+");

            switch (inputArray[0]) {
                case "Case":
                    if (inputArray[1].equals("lower")) {
                        username = username.toLowerCase();
                        System.out.println(username);
                    } else if (inputArray[1].equals("upper")) {
                        username = username.toUpperCase();
                        System.out.println(username);
                    }
                    break;
                case "Reverse":
                    int startIndex = Integer.parseInt(inputArray[1]);
                    int endIndex = Integer.parseInt(inputArray[2]) + 1;
                    int length = username.length();
                    if (startIndex >= 0 && length >= endIndex) {
                        String substring = username.substring(startIndex, endIndex);
                        System.out.println(new StringBuilder(substring).reverse().toString());
                    }
                    break;
                case "Cut":
                    String substring = inputArray[1];
                    if (username.contains(substring)) {
                        username = username.replace(substring, "");
                        System.out.println(username);
                    } else {
                        System.out.printf("The word %s doesn't contain %s.%n", username, substring);
                    }
                    break;
                case "Replace":
                    char inputCharReplace = inputArray[1].charAt(0);
                    if (username.contains(inputCharReplace + "")) {
                        username = username.replaceAll(inputCharReplace + "", "*");
                        System.out.println(username);
                    }
                    break;
                case "Check":
                    char inputChar = inputArray[1].charAt(0);
                    boolean contains = username.contains(inputChar + "");
                    if (contains) {
                        System.out.println("Valid");
                    } else {
                        System.out.printf("Your username must contain %s.%n", inputChar);
                    }
                    break;
            }

            input = sc.nextLine();
        }

    }
}