import java.util.Scanner;

public class Е04CatFood {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int numberCat = Integer.parseInt(scanner.nextLine());

        int group1 = 0;
        int group2 = 0;
        int group3 = 0;

        for (int i = 0; i < numberCat; i++) {
            double gr = Double.parseDouble(scanner.nextLine());
           //проверка за 1-ва група
            if(gr >= 100 && 200<gr){
                group1++;
            }
            //проверка за 2-ва група
            if(gr >= 200 && 300<gr){
                group2++;
            }
            //проверка за 3-ва група
            if(gr >= 300 && 400<gr){
                group3++;
            }

        }


        System.out.printf("Group 1: %d cats.%n",group1);
        System.out.printf("Group 1: %d cats.%n",group2);
        System.out.printf("Group 1: %d cats.%n",group3);
    }
}