class RomanToKana:
    vowels = ('a', 'i', 'u', 'e', 'o')

    consonants = (
        ('', ('あ', 'い', 'う', 'え', 'お'), ('ア', 'イ', 'ウ', 'エ', 'オ'))
        ('k', ('か', 'き', 'く', 'け', 'こ'), ('カ', 'キ', 'ク', 'ケ', 'コ'))
        ('y', ('や', 'い', 'ゆ', 'ぃぇ', ''), ('', '', '', '', ''))
    )