memory = {}
num = {}
def chat(msg):
    if msg.startswith("覚えて "):
        key, value = msg[4:].split("=")
        memory[key.strip()] = value.strip()
        return "覚えたよ"
    if msg.startswith("忘れて "):
        key = msg[4:].strip()
        if key in memory:
            memory.pop(Q)
            return "忘れたよ"
        else:
            return "知らないな"
    if msg in memory:
        return memory[msg]
    return "知らないな"

while True:
    user = input("You: ")
    if user == "end":
        break
    print("AI:", chat(user))