Room 1 Room 2 T/( B X Y 口 The answer(Step2) Unseen 令 Actions: Turn on Switch B Immediately go to Room 2 Center of speech Technology, Tsinghua University Slide 10Center of Speech Technology, Tsinghua University Slide 10 Unseen A B C X Y Z Room 1 Room 2 ❑ The Answer (Step 2) ❖ Actions: ➢ Turn on Switch B. ➢ Immediately go to Room 2