Create a function that takes any sentence and redistributes the spaces (and adds additional spaces if needed) so that each word starts with a vowel. The letters should all be in the same order but every vowel in the sentence should be the start of a new word. The first word in the new sentence may start without a vowel. It should return a string in all lowercase with no punctuation (only alphanumeric characters).



EXAMPLES
'It is beautiful weather today!' becomes 'it isb e a ut if ulw e ath ert od ay'
'Coding is great' becomes 'c od ing isgr e at'
'my number is 0208-533-2325' becomes 'myn umb er is02085332325'

Difficulty: EASY
Starter code: def vowel_start(st):
	

Solutions:
from re import sub

def vowel_start(st):
	return sub('(?<=.)([aeiou])', ' \\1', sub('[^a-z0-9]', '', st.lower()))


def vowel_start(s):
	r = ''
	for letter in s:
		if letter in 'aeiouAEIOU':
			r += ' ' + letter.lower()
		elif letter.isalnum():
			r += letter.lower()
	return r.lstrip(' ')


from string import ascii_lowercase, digits

def vowel_start(st):
	return ''.join([' ' + c if c in 'aeiou' else c for c in st.lower() if c in ascii_lowercase + digits]).lstrip()


from re import sub

def vowel_start(st):
	return sub('\\B([aeiou])', ' \\1', ''.join(filter(str.isalnum, st)).lower())


def vowel_start(stg):
	return ''.join((f"{(' ' if c in 'aeiou' else '')}{c}" for c in stg.lower() if c.isalnum())).lstrip()


def vowel_start(st):
	return ''.join((' ' * (i in 'aeiou') + i for i in st.lower() if i.isalnum())).strip()


def vowel_start(st):
	rst = ''
	for e in st:
		if not e.isalnum():
			continue
		e = e.lower()
		if e in 'aeiou':
			rst += f' {e}'
		else:
			rst += e
	return rst.lstrip()


def vowel_start(st):
	return ''.join((f"{' ' * (c in 'aeiou')}{c}" for c in st.lower() if c.isalnum())).lstrip()


vowel_start = lambda s: ''.join((' ' * (x in 'aeiou') + x * x.isalnum() for x in s.lower())).strip()


import re

def vowel_start(st):
	st = re.sub('[^a-zA-Z0-9]', '', st.lower())
	r = st[0] if len(st) else ''
	for s in st[1:]:
		r += (' ' if s in 'aeiou' else '') + s
	return r