sub InThaiVowel {
    return <<'END';
0E30 0E45
0E4D
0E22  #Thai consonant yo-yak can also be a vowel (like 'y' in English)
0E2D  #Thai consonant or-ang can also be a vowel
0E27  #Thai consonant wo-wen is only a vowel following mai han-akat
END
}