A royal garden is arranged according to the central axis, with seven courtyards arranged in turn from front to back. The seven courtyards are named after the Chinese characters sun, moon, gold, wood, water, fire and earth. It is known that: (1) the day courtyard is not the front courtyard; (2) the fire courtyard is adjacent to the earth courtyard; (3) the number of courtyards separated by gold and moon is the same as the number of courtyards separated by wood and water.
Based on the above information, which of the following courtyards may be a courtyard with the word sun?
The fifth courtyard