import sys


class Node:
    def __init__(self, text):
        self.text = text
        self.left = None
        self.right = None

    def is_question(self):
        return self.text.endswith("?")


def read_line():
    line = sys.stdin.readline()
    if line == "":
        return None

    if line.endswith("\n"):
        line = line[:-1]
        if line.endswith("\r"):
            line = line[:-1]

    return line


class Tree:
    def __init__(self):
        self.root = None
        self.question_count = 0
        self.answer_count = 0

    def load(self):
        pending_questions = []

        while True:
            text = read_line()
            if text is None:
                return False

            if text == "":
                if self.root is None or pending_questions:
                    return False
                return True

            node = Node(text)
            if self.root is None:
                self.root = node
            else:
                if not pending_questions:
                    return False

                parent = pending_questions[-1]
                if parent.left is None:
                    parent.left = node
                else:
                    parent.right = node
                    pending_questions.pop()

            if node.is_question():
                self.question_count += 1
                pending_questions.append(node)
            else:
                self.answer_count += 1

    def find_animal(self):
        current_node = self.root

        while True:
            print(current_node.text)
            if not current_node.is_question():
                print("Koniec")
                return

            choice = read_line()
            if choice is None:
                print("Koniec vstupu")
                return
            if choice == "a":
                current_node = current_node.left
            elif choice == "n":
                current_node = current_node.right
            else:
                print("Nerozumiem")
                return


def main():
    print("Expert zo zoo to vie.")
    tree = Tree()
    if not tree.load():
        print("Chybna databaza")
        return

    print(f"Pocet otazok: {tree.question_count}")
    print(f"Pocet odpovedi: {tree.answer_count}")
    print("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.")

    tree.find_animal()


if __name__ == "__main__":
    main()