1. Short unstressed vowels tend to be reduced to the neutral vowel schwa. 2. There is also one neutral vowel ,, not belonging to either group. 3. Therefore if a word contains back vowels, neutral vowels may appear alongside them. 4. If the diphthong is followed by a neutral vowel , a little flick is added. 5. There is little or no change in the actual vowel quality of the neutral vowels . 6. The vowel harmony system distinguishes front, back and neutral vowels , much like the system found in Finnish. 7. Words may generally not contain both front-harmonic and back-harmonic vowels; but both groups can combine with neutral vowels . 8. Most of the time, however, the neutral vowel [ h : ] is appended to achieve the desired effect. 9. While,,, and are all front unrounded vowels, they are considered to be " neutral vowels " in Hungarian vowel harmony. 10. The schwa [ Y ] is in the center of the chart and is frequently referred to as the neutral vowel .