instruction: Based on this article, what was the relationship between Ala-ud-Din Bahman Shah and Alauddin Mujahid Shah?
context: Mohammed Shah I (reigned 1358–1375) was the second ruler of the Bahmani Sultanate, a late medieval kingdom of India. He succeeded his father Ala-ud-Din Bahman Shah. His reign was marked by a series of wars between his kingdom and two neighboring kingdoms, the Vijayanagara and the Warangal under Kapaya Nayaka. He was succeeded by his son Alauddin Mujahid Shah.
response: Alauddin Mujahid Shah was the grandson of Ala-ud-Din Bahman Shah by his son Mohammed Shah I.