20001 : 고무오리 디버깅

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Stack;

public class Main {

	public static void main(String[] args) throws IOException {

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		Stack<Boolean> stack = new Stack<>();
		String str = br.readLine();

		if (str.equals("고무오리 디버깅 시작")) {
			while (true) {

				str = br.readLine();

				if (str.equals("고무오리")) {
					if (stack.size() == 0) {
						stack.push(true);
						stack.push(true);
					} else {
						stack.pop();
					}

				} else if (str.equals("문제")) {
					stack.push(true);
				} else if (str.equals("고무오리 디버깅 끝")) {
					break;
				}

			}

			if (stack.size() == 0) {
				System.out.println("고무오리야 사랑해");
			} else {
				System.out.println("힝구");
			}
		}
	}
}