occur, usually the first vowel has the level tone and the 
                    second one other tones. The vowel [0] in these sequences of 
                    vowels is also in free variation with [w] and [v] as some 
                    speakers pronounce it with [w] as in [kwà] or [kwà] ‘open 
                    mouth’ (imp).  
                  High 
                    front unrounded vowel has an on glide positional variant [yi] 
                    in the initial position and a lower high variant [U] in a 
                    first syllable of word with a falling tone on it. 
                  The 
                    six simple vowels mentioned above are capable of showing three 
                    way opposition in tone. These are Falling, Rising and level 
                    tones. 
                  Below, 
                    contrasting pairs are given for vowels. First, pairs are given 
                    in phonetic transcription, then in phonemic transcription. 
                    Contrasts for vowels are given in the following way : 
                  1. 
                    Contrast on the basis of jaw height. 
                  2. 
                    Contrast on the basis of lip position. 
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