p t tr c k <p t tr~r q k>
m n ŋ <m n ng>
s ɕ x <s sh h>

i u ɛ ɞ ɔ a <i u e ö o a>

á â à <a â à>

[ɛ] and [ɞ] are marginal and contrast with [a ɔ] only in open syllables, in closed syllables they're in complementary distribution ([ɛ ɞ] occur before alveolars, [a ɔ] everywhere else)