antecedent segments of the clusters, viz., h, y, and w already exist in the phonemic system.
None of these reasons by itself would suffice to arrive at this analysis. It is the fact that all these reasons hold good, that prompts us to analyze these segments as clusters*.
1.3.	Contrasts
The contrasts are given for phonemes which differ in a single feature or are phonetically similar.
1.3.1.	Tones :
(i)  /pyal/  `bird’ /pyą/ `to bite (as a snake)’ /piyą/ `to axe’ /pyą/ to pack’ (ii) /nyą/ `to push’ /nyą/ `daughter-in-law’ /nya/  `room’ /kinyā/  `nine’ (iii)  /kānpį/ `opium cloth’ /pą/ `axe’
* "Instances where the principle of economy unambiguously points to one interpretation rather than another usually turns out to be cases in which the other three principles would eventually lead to the same choice, without, the addition of the fourth". - Hockett (1975), p.110.
/pā/ `to cross’ /pa/ `yeast’
1.3.2.	Vowels:
1.3.2.1.	Contrasts for Height :
(i) /i/ - /e/     / /  `to be’   / é / `this’   / n/  `to cut’   / né / `breast’ (ii)  / i / - / a /     / prņ / `night’   / paró / `pigeon’       (iii) / u / - / o /     / ś /  `to pinch’   / ó / `to shoot’
1.3.2.2.	Contrasts for Point of Articulation :
(i) / i / - / i / / gī / `yam’ / g/   `rain-hat’   (ii) /i / - /u / / plu /  `woodcock’ / pślū / `onion’ / t/  `to fold’ / tś /   `to sell’   (iii)  / i / - / u / / / `to be’