def checker(x, y):
'''Проверяет символы на соответствие условию'''
    VOWELS = ['A', 'E', 'I', 'O', 'U', 'Y']
    CONSOSANTS = ['B', 'C', 'D', 'F', 'G', 'H', 'J', 'K', 'L',
                 'M,' 'N', 'P', 'Q', 'R', 'S', 'T', 'V', 'W', 'X', 'Z']
    if (x in CONSOSANTS and y in VOWELS) or (x in VOWELS and y in CONSOSANTS):
        return True
    else:
        return False

def foo(st):
    lst = st.split()
    new_lst = []
    flag = False
    for word in lst:
        for elem1, elem2 in zip(word, word[1:]):
            elem1 = elem1.upper()
            elem2 = elem2.upper() 
            #тут мысль обрывается
    return new_lst 

>>> def f(s):
...     alpha = set('aeiouy')
...     it = iter(s)
...     inalpha = next(it, None) in alpha
...     for c in it:
...         if c.lower() in alpha:
...             if inalpha:
...                 return False
...         elif not inalpha:
...             return False
...         inalpha = not inalpha
...     return True
... 
>>> f('')
True
>>> f('abab')
True
>>> f('abaa')
False
>>>

 f('aba')
False

f('bwbwbw')
True

>>> f('aba')
True
>>> f('bwbwbw')
False
>>>

#!/usr/bin/env python
from itertools import imap as map
from toolz import sliding_window, isdistinct
def isvowel(sym):
    return sym in set("aeiouy")
def f(string):
    return all(map(isdistinct,
                   sliding_window(2,
                                  map(isvowel,
                                      string))))

#!/usr/bin/env hy
(import [itertools [imap :as map]]
	[toolz [sliding_window isdistinct]])
(defn isvowel [sym]
  (in sym (set "aeiouy")))
(defn f [string]
  (all (map isdistinct
	    (sliding_window 2
			    (map isvowel
				 string)))))