(v)  /m/ - /n/ - //     / tamį /  `medicine’   / tanā / `greens’   / tįa/  `fish’       (vi) / s / - / h /     /įsą/  `nerve’   /aha/ `thigh’       (vii)  /w/ - /y/     /pśyą/  `to pound’   /pśwą/  `bitterness’  1.3.3.2.    Contrasts for the State of Vocal Cords :   (i) / p/ - / b/     / pņ/ `prison’   / bó/ `march’       (ii) / t / - / d /     / to /  `tender nut’   /dó/  `cough’        (iii)  /k/ - /g/     /kwįg/  `dog’   /gwįg/ `priest’       (iv) / c / - / j /     / tac/  `prejudice’   / tįji/  `height’       (v) / s / - / z /     / só /  `to comb’   / zó /  `to break’  1.3.3.3.    Contrasts for Phonetic Similarity :   (i) / r / - / l /     /prą/  `virtue’   /pla/ `salt’   /rį/  `cliff’   /wélą/  `they’       (ii)  /c/ - /s/     /có/ `to place’   /só/  `to comb’       (iii) /j/ - /z/     / tįji /  `height’   /tazi / `breast’ 1.4.    Allophony   1.4.1.   Tones :   For the allophonic statement of tones, it is necessary to bring the concept of syllable as a reference point. We use the terms onset, peak and coda for the description. Taking the pitch of the normal speech as mid, we can set up a three-way division of the pitch register, viz., high, mid and low. This parameter when combined with the two others used for classification gives rise to a six tone system, of which some tones are predictable. The diagram shown below is adapted from that given by Wang (1967) and the `tone letter’