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15 lines
481 B
Python
15 lines
481 B
Python
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def is_consonant(letter):
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if not isinstance(letter, str):
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raise ValueError("Argument 'letter' must be type str")
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if len(letter) != 1:
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raise ValueError("Argument 'letter' must be 1 long")
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return not is_vowel(letter)
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def is_vowel(letter):
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if not isinstance(letter, str):
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raise ValueError("Argument 'letter' must be type str")
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if len(letter) != 1:
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raise ValueError("Argument 'letter' must be 1 long")
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return letter in 'aeiou'
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