rise to a system of six phonemic vowels /a aː i iː u uː/. Long vowels are represented by double letters in the orthography: ⟨aa⟩, ⟨ii⟩, ⟨uu⟩. The following diphthongs occur: /ai ia au ua iu ui/. No more than two vowels occur in a sequence in Iñupiaq. The Bering strait dialect has a fourth vowel /e/, which preserves the fourth proto-Eskimo vowel reconstructed as */ə/. In the other dialects, proto-Eskimo */e/ has merged with the closed front vowel /i/. The merged /i/ is referred to as the “strong /i/”, which causes palatalization when preceding consonant clusters in the North Slope dialect (see section on palatalization below). The other /i/ is referred to as “the weak /i/”. Weak and strong /i/s are not differentiated in orthography, making it impossible to tell which ⟨i⟩ represents palatalization “short of looking at other processes which depend on the distinction between two i's or else examining data from other Eskimo languages”. However, it can be assumed that, within a word, if a palatal consonant is preceded by an ⟨i⟩, it is strong. If an alveolar consonant is preceded by an ⟨i⟩, it is weak. Words begin with a stop (with the exception of the palatal stop /c/), the fricative /s/, nasals /m n/, with a vowel, or the semivowel /j/. Loanwords, proper names, and exclamations may begin with any segment in both the Seward Peninsula dialects and the North Slope dialects. In the Uummarmiutun dialect words can also begin with /h/. For example, the word for "ear" in North Slope and Little Diomede Island dialects is siun whereas in Uummarmiutun it is hiun. A word may end in any nasal sound (except for the /ɴ/ found in North Slope), in the stops /t k q/ or in a vowel. In the North Slope dialect if a word ends with an m, and the next word begins with a stop, the m is pronounced /p/, as in aġnam tupiŋa, pronounced /aʁnap tupiŋa/ Very little information of the prosody of Iñupiaq has been collected. However, "fundamental frequency (Hz), intensity (dB), loudness (sones), and spectral tilt (phons - dB) may be important" in Malimiutun. Likewise, "duration is not likely to be important in Malimiut Iñupiaq stress/syllable prominence". North Slope Iñupiaq For North Slope Iñupiaq The voiceless stops /p/ /t/ /k/ and /q/ are not aspirated. This may or may not be true for other dialects as well.