Assume that i was invited by my collage-mate for a normal visit to see his luxury house and for some help in his project work. I went to his sweet home, no one is there except me and my friend. Late night, in the comfort of his luxurious house, I felt asleep. When I woke up, I found myself alone in the house. My friend is missing at the house!!! I strike doors heavily and shouted at the top of my voice, but no response. I think the door might be locked outside. Will you please help me to find the spare key to open the door..?
