Tombstone, including the base (including the underground part), is divided into three sections on average, with the upper, middle and lower sections representing the head, abdomen and feet respectively. Normally, it will not be sent to any room, but if it is damaged, it will be in a certain room.
The upper part should be in 1, rooms 4 and 7.
The middle part should be in rooms 2, 5 and 8.
The bottom should be rooms 3, 6 and 9.