
def is_vowel(c):
    if c[0] in 'aeiou':
        return True
    else:
        return False

print(is_vowel('r'))

print(is_vowel('e'))

def is_vowel(c):
    if c[0] in 'aeiou':
        return True
    else:
        return False

print(is_vowel('r'))

print(is_vowel('e'))