/// <summary>
        /// Check if the syllable has vowel or has a sonorant phoneme.
        /// </summary>
        /// <param name="entry">Script entry.</param>
        /// <param name="phoneme">Phoneme.</param>
        /// <param name="phones">Phones of the syllable.</param>
        /// <returns>Bool.</returns>
        private static bool IsGoodSyllableWithSonorant(ScriptItem entry,
                        Phoneme phoneme,
                        string[] phones)
        {
            bool goodSyllable = IsSyllableWithLessVowel(entry, phoneme, phones);

            if (goodSyllable)
            {
                if (!IsSyllableWithEnoughVowel(entry, phoneme, phones))
                {
                    if (phoneme.GetVowelIndexes(phones).Length == 0)
                    {
                        // no vowel, should have one sonorant and more than one consonants
                        int[] sonorantIndexes = phoneme.GetSonorantIndexes(phones);
                        if (sonorantIndexes.Length == 0 || phones.Length == 1)
                        {
                            goodSyllable = false;
                        }
                    }
                    else
                    {
                        goodSyllable = false;
                    }
                }
            }

            return goodSyllable;
        }
 /// <summary>
 /// Check if the syllable has too many vowels.
 /// </summary>
 /// <param name="entry">Script entry.</param>
 /// <param name="phoneme">Phoneme.</param>
 /// <param name="phones">Phones of the syllable.</param>
 /// <returns>True if not having too many.</returns>
 private static bool IsSyllableWithLessVowel(ScriptItem entry,
                 Phoneme phoneme,
                 string[] phones)
 {
     int[] vowelIndexes = phoneme.GetVowelIndexes(phones);
     return vowelIndexes.Length <= entry.MaxVowelCountInSyllable;
 }