SoftUniCoursePlanning_Tech

import java.util.*;
public class SoftUniCoursePlanning {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        List<String> course = new ArrayList<>(Arrays
                .asList(scanner.nextLine()
                        .split(", ")));

        String line = scanner.nextLine();

        while (!"course start".equals(line)) {
            String[] tokens = line.split(":");
            String operation = tokens[0];
            String lessonName = tokens[1];

            switch (operation) {
                case "Add":
                    if (course.contains(lessonName)) {
                        continue;
                    } else {
                        course.add(lessonName);
                    }
                    break;
                case "Insert":
                    String index = tokens[2];
                    if (!course.contains(lessonName)) {
                        int position = Integer.parseInt(index);

                        if (position >= 0 && position < course.size()) {
                            course.add(position, lessonName);
                        }
                    }
                    break;
                case "Exercise":
                    if (course.contains(lessonName)) {
                        int position = course.indexOf(lessonName + 1);
                        course.add(position, lessonName + "-Exercise");
                    } else {
                        course.add(lessonName);
                        course.add(lessonName + "-Exercise");
                    }
                    break;
                case "Remove":
                    course.remove(lessonName);
                    break;
                case "Swap":
                    String secondLesson = tokens[2];
                    int position = course.indexOf(lessonName);
                    int swapPosition = course.indexOf(secondLesson);

                    String exerciseLessonName = lessonName + "-Exercise";
                    String exerciseSecondLesson = secondLesson + "-Exercise";

                    if (course.contains(lessonName) && course.contains(secondLesson)) {
                        Collections.swap(course
                                , course.indexOf(lessonName)
                                , course.indexOf(secondLesson));
                        if (course.contains(exerciseLessonName) && course.contains(exerciseSecondLesson)) {
                            Collections.swap(course
                                    , course.indexOf(exerciseLessonName)
                                    , course.indexOf(exerciseSecondLesson));
                        }
                    }
                    break;
            }


            line = scanner.nextLine();
        }
        for (int i = 0; i < course.size(); i++) {
            int n = i + 1;
            System.out.println(n + "." + course.get(i));
        }

    }
}