import java.util.Scanner;

public class Username {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        StringBuilder username = new StringBuilder(scanner.nextLine());
        String input = scanner.nextLine();
        while (!input.equals("Registration")){
            String command = input.split(" ")[0];
            switch (command){
                case "Letters":
                    String option = input.split(" ")[1];
                    if (option.equals("Lower")){
                        username = new StringBuilder (username.toString().toLowerCase());
                    } else if (option.equals("Upper")){
                        username = new StringBuilder (username.toString().toUpperCase());
                    }
                    System.out.println(username);
                    break;
                case "Reverse":
                    int startIndex = Integer.parseInt(input.split(" ")[1]);
                    int endIndex = Integer.parseInt(input.split(" ")[2]);
                    if (isValidIndex(startIndex,username) && isValidIndex(endIndex, username)){
                        System.out.println(new StringBuilder(username.subSequence(startIndex, endIndex+1)).reverse());
                    }
                    break;
                case "Substring":
                    String substring = input.split(" ")[1];
                    if (username.toString().contains(substring)){
                        username = new StringBuilder (username.toString().replace(substring, ""));
                        System.out.println(username);
                    } else {
                        System.out.printf("The username %s doesn't contain %s.%n",username,substring);
                    }
                    break;
                case "Replace":
                    char character = input.split(" ")[1].charAt(0);
                    username = new StringBuilder (username.toString().replaceAll(String.valueOf(character), "-"));
                    System.out.println(username);
                    break;
                case "IsValid":
                    character = input.split(" ")[1].charAt(0);
                    if (username.toString().contains(String.valueOf(character))){
                        System.out.println("Valid username");
                    } else {
                        System.out.printf("%c must be contained in your username.%n",character);
                    }
                    break;
            }
            input = scanner.nextLine();
        }
    }
    public static boolean isValidIndex(int index, StringBuilder username){
        return index >= 0 && index < username.length();
    }
}