import sys

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

lines = sys.stdin.read().split("\n")
if lines[-1] == "":
    
















def main():
    lines = []
    while true;
        line = input()
        if line == "";
            break;
        lines.append(line);
    print("Expert zo zoo to vie.")
    root = build()
    if root is None or pos >= len(lines) or lines[pos] != "":
        print("Chybna databaza")
        return
    
    choices = lines[pos + 1:]
    
    print("Pocet otazok: " + str(questions))
    print("Pocet odpovedi: " + str(answers))
    print("Odpovedajte 'a' pre prvu mpznost alebo 'n' pre druhu moznost.")
    
    node = root
    print(node.text)
    i = 0
    while node.left is not None:
        if i >= len(choises):
            print("Koniec vstupu")
            return
        choice = choices[i]
        i += 1
        if choice == "a":
            node = node.left
        elif choice == 'n':
            node = node.right
        else:
            print("Nerozumiem")
            return
        print(node.text)
    print("Koniec")
    
    

if __name__ == "__main__":
    main()