In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

Example input: Tracy slept awkwardly on their new bed and was having some pain, so Tracy cracked her neck. 
Question: What did Tracy do with her neck?
Example output: crack her neck
Example explanation: The output phrase perfectly answers the question and is explicitly mentioned in the passage as well.
Q: After the end of Forty Years' War in 1424, Ava gave up its dream of rebuilding the Pagan Empire. Instead, for the next six decades, it would struggle to hold on to its vassal states. Rebellions arose every time a new king came to power. The new king would have to reestablish his power all over again by gaining the fealty of all the vassal states, usually by show of force. Of these, the remote vassal state of Toungoo , tucked away in the southeastern corner across the Pegu Yoma range, proved most troublesome to successive kings at Ava. Toungoo lords rebelled against Ava in 1426-1440, 1451-1459 and 1468-1470, usually with Pegu's implicit or explicit support. Ava also faced rebellions at Mohnyin  and Prome . The beginning of the end of Ava came in 1480. The new king Minkhaung II was greeted with a multitude of rebellions but it proved to be different this time. The most serious rebellion was by his younger brother, lord of Yamethin. With a serious rebellion so close to Ava, vassal states broke away one by one. The Yamethin rebellion went on until 1500. In 1482, Minkhaung's uncle at Prome successfully revolted, the Prome Kingdom sprang into existence. Ava's vassal Shan states of Mohnyin, Mogaung, Momeik and Kale also broke away in the 1490s. Surprisingly, Ava's steadfast ally during this period was the usually restive vassal of Toungoo which remained loyal to Ava until Minkhaung's death in 1501. 
Question: What state helped to foment Tougoo rebellion
A:
Pegu's implicit or explicit suppor