Seks-ta feh-ree-ah feh-lees
Here's a breakdown of the pronunciation:
* Sexta: "Seks-ta" with the "x" sounding like "ks"
* Feira: "feh-ree-ah" with the "ei" sounding like "ay" in "say"
* Feliz: "feh-lees" with the "z" sounding like "s"
Note: The stress is on the first syllable of each word ("Sex", "Fei", "Fe").