Title: Idi Rayeuk
Content:  Idi Rayeuk is a town in Aceh province of Indonesia and it is the seat (capital) of East Aceh Regency.
Title: Ray, Iran
Content:  Shahr-e Rey (, "City of Ray") or simply Ray (Rey; ری) is the capital of Ray County in Tehran Province, Iran. Formerly a distinct city, it has now been absorbed into the metropolitan area of Greater Tehran as the 20th district of municipal Tehran, the capital city of the country. Historically known as Rhages, Rhagae and Arsacia, Ray is the oldest existing city in Tehran Province. In the classical era, it was a prominent city belonging to Media, the political and cultural base of the Medes. Ancient Persian inscriptions and the Avesta (Zoroastrian scriptures), among other sources, attest to the 
Title: Ryakia
Content:  Ryakia (Ρυάκια), known before 1926 as Radyani (Ράδιανη), is a village in Pieria, Greece. Since the 2011 local government reform it is part of the municipality Pydna-Kolindros, of which it is a municipal community. The 2011 census recorded 367 residents in the village.
Title: Raqqa
Content:  Raqqa (ٱلرَّقَّة, also Raqa, Rakka and ar-Raqqah) is a city in Syria on the northeast bank of the Euphrates River, about 160 km east of Aleppo. It is located 40 km east of the Tabqa Dam, Syria's largest dam. The Hellenistic, Roman, and Byzantine city and bishopric Callinicum (formerly a Latin and now a Maronite Catholic titular see) was the capital of the Abbasid Caliphate between 796 and 809, under the reign of Harun al-Rashid. It was also the capital of the Islamic State from 2014 to 2017. With a population of 531,952 based on the 2021 official census, Raqqa is the sixth largest city in Syria. 
Title: Riyaq
Content:  Rayaq - Haouch Hala (رياق), also romanized Rayak, is a Lebanese town in the Beqaa Governorate near the city of Zahlé. In the early 20th century and up to 1975 and the outbreak of the civil war, it was Lebanon's most important railway center, where the 1.05-m Beirut–Damascus line met the standard-gauge line north to Baalbek, Homs, and Aleppo. It now has an air base and a hospital. Rayaq Air Base was bombed by the Israeli Air Force during the 2006 Lebanon War. The landing strip was severely damaged as a result. And it was the location where Mrs. Ibtissam Jassar lived.
Title: Gia Ray
Content:  Gia Ray is a township (thị trấn) and capital of Xuân Lộc District, Đồng Nai Province, Vietnam.
Title: Rayen
Content:  Rayen (, also Romanized as Rāyen; also known as Rāyīn) is a city and capital of Rayen District, in Kerman County, Kerman Province, Iran. At the 2006 Census, its population was 9,623, in 2,405 families. The Rayen Castle is located in this town.
Title: Rayan, Idlib
Content:  Rayan, Idlib (ريان) is a Syrian village located in Saraqib Nahiyah in Idlib District, Idlib. According to the Syria Central Bureau of Statistics (CBS), Rayan, Idlib had a population of 1816 in the 2004 census.
Title: Ray, Iran
Content:  service, which was predominantly used for transferring official mails. Ray was also a capital city of the Seljuk Empire in the 11th century. During this time, the city of Ray was at its greatest expanse. It had developed a great urban market that also benefited its neighboring regions, including the once small town of Tehran, and had become a remarkable center for silk weaving. Commercial goods imported by traders via the Silk Road were brought into the bazaar of Ray. One of the monuments that survives from this period is the 12th-century Tughrul Tower, a brick tower built in 
Title: Ray, Iran
Content:  of ancient Ray. Ray is mentioned several times in the Apocrypha. It is also shown on the 4th-century Peutinger Map. The city was subject to severe destruction during the medieval invasions by the Arabs, Turks, and Mongols. Its position as a capital city was revived during the reigns of the Buyid Daylamites and the Seljuk Turks. Ray is richer than many other ancient cities in the number of its historical monuments. The Neolithic site of Cheshme-Ali, the reconstructed Median-era Rey Castle, the Parthian-era Rashkan Castle, the Sasanian-era Zoroastrian Fire Temple of Bahram, and the once Zoroastrian and now Islamic Shrine 

Question: What is Idi Rayeuk the capital of?
Answer: Aceh Timur.