The term 'Capital Mideast' refers to the four major cities in the Middle East region. These cities are IRAN (4 letters), ADEN (4 letters), Sana (4 letters), and SINAI (5 letters). IRAN is the capital of the Islamic Republic of IRAN, located in the western part of the country. ADEN is the former capital of Yemen, located on the southern coast of the Arabian Peninsula. Sana is the capital of Yemen, located in the southwestern part of the country. SINAI is the peninsula located between the Mediterranean Sea and the Red Sea, and is part of Egypt.