CountBeers

import java.util.ArrayList;
import java.util.Scanner;


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

		String input = "";

		ArrayList<String> list = new ArrayList<>();

		while (!input.equals("End")) {
			input = scanner.nextLine();

			if (input.equals("End")) {
				break;
			}

			list.add(input);
		}

		ArrayList<Integer> stacks = new ArrayList<>();
		ArrayList<Integer> beers = new ArrayList<>();

		int i = 0;

		while (i < list.size()) {
			if (list.get(i).contains("stacks")) {
				String[] parts = list.get(i).split(" ");
				stacks.add(Integer.parseInt(parts[0]));
			}
			i++;
		}

		i = 0;

		while (i < list.size()) {
			if (list.get(i).contains("beers")) {
				String[] parts = list.get(i).split(" ");
				beers.add(Integer.parseInt(parts[0]));
			}
			i++;
		}

		int b = 0;
		int s = 0;

		for (i = 0; i < beers.size(); i++) {
			b+=beers.get(i);
		}

		for (i = 0; i < stacks.size(); i++) {
			s+=stacks.get(i);
		}

		while (b >= 20) {
			b-=20;
			s++;
		}

		System.out.printf("%d stacks + %d beers", s, b);
		scanner.close();
	}
}