You went to visit your grandmother who is very old and is not keeping well lately. After travelling for many hours you finally reached her place. You entered the house to meet your grandmother but to your surprise you did not see her there and to make things even more strange the main door shut close with a bang. After waiting for many hours you finally decided to go out of the house but you could not open the door. You have no idea where the key to the door is. You will have to explore the house and find the key.