the vowel e is subjected to the reduction Type B before “-nt”, “-nce”, “-n”, “-m”. 'silence ['saɪləns] 'student ['stju:dənt] 'solemn ['sləm] 'sullen ['slən]
╻inac'cessible [╻ɪnək'səsəbl], but 'possible ['psɪbl]
the vowel u in the first type of syllable at the beginning and at the end of the word is not reduced and in the middle of the word is subjected to the quantitative reduction.