 Primary stresses occur at regularly timed intervals in an utterance.Secondary stresses occur according to an alternating-stress system, which most commonly dictates that two secondary stresses follow a primary stressed (phonetically long) vowel.The most common syllable structures that occur in Havasupai-Hualapai are CV, CVC, and VC; however, consonant clusters of two or three consonants can and do occur initially, medially, and finally.