import java.util.*;
public class MyClass {
    public static void main(String args[]) {
        Scanner scanner = new Scanner(System.in);
        Map<String, List<String>> bigMap = new LinkedHashMap<String,List<String>>();
        String nextLine = scanner.nextLine();
        while(true) {
            if(nextLine.equals("end")) {
                for (Map.Entry<String, List<String>> set : bigMap.entrySet())
                {
                    System.out.println(set.getKey().trim() + ": " + set.getValue().size());
                    printList(set.getValue());
                }
                break;
            } else {
                String[] arrOfStr = nextLine.split(":");
                if(!bigMap.containsKey(arrOfStr[0])) {
                    List<String> studentBufferList = new ArrayList<String>();
                    studentBufferList.add(arrOfStr[1]);
                    bigMap.put(arrOfStr[0], studentBufferList);
                } else {
                    List<String> courseStudents = bigMap.get(arrOfStr[0]);
                    courseStudents.add(arrOfStr[1]);
                    bigMap.put(arrOfStr[0], courseStudents);
                }
            }
            nextLine = scanner.nextLine();
        }
    }
    public static void printList(List<String> list) {
        for (String student: list) {
            System.out.printf("-- %s\n", student);
        }
    }
}