The word "TISTO" is spelled using the International Phonetic Alphabet (IPA) as /ˈtistoʊ/. The first syllable is pronounced with a stressed "t" sound, followed by a short "i" sound, and ending with a soft "s" sound. The second syllable begins with a soft "t" sound and ends with a long "o" sound. While this spelling may appear unusual, it is not uncommon for proper nouns, such as names or brands, to deviate from established phonetic rules.