The doctor started walking from his home towards the north direction. After a distance of 2 km, he took a right turn and walked 3 km to reach a shop. From here, he took a left turn and walked a distance of 4 km to reach his friend's house. Now, he took a left turn and walked a distance of 2 km to reach a bank. At last, he took two consecutive left turns and walked 3 km and 1 km respectively to reach the hospital. In which direction is his friend's house with respect to hospital?