What are two major river in turkey?

There are dozens and dozens of rivers in Turkey. Here is a list: Mutludere, Veleka, Delice, Devrez, Gok, Sakarya, Seydisuyu, Prosu, Ankara, Harsit, Green, Cekerek, Kelkit, Kiliclar, Tohumluk, Bartin, Coruh, Gelevara, Kara Dere, Terme, Cayster, Cadmus, ksu, Manavgat, Dim, Muftu, Tarsus, Seyhan, Euphrates, and Tigris.