多正則表達式在python中抓取數字

我不是正則表達式的專家，但我從頭開始做了這個，我只需要基於這個獲取數字和字母 [ae] ：

SnnEnn   where n represent numbers  
SnnEnnl  where l = letter [a-e]  

nnXnn    where n represent numbers 
nnXnnl   where l = letter [a-e] 

但在少數情況下會失敗：

02x01      match '02x01'                                      fail (It should be '02' '01')
03x02a     match '03x02'..............groups 'a'             fail (It should be '03' '02' 'a')
S03E01     match 'S03E01'.............groups '03'  '01'      ok
S03E01a    match 'S03E01a'............groups 'S03E01'  'a'   fail.(It should be '03' '01' 'a')

03x02xxxx  match '03X02xxxx' groups '03x02xxxx'    fail (it should be just [a-e] and limit to one letter) 
S03E01xxx  match '03E01xxxx' groups '03e01xxxx'    fail (idem)

正則表達式101

我正在使用這個正則表達式：

(\d+[x]\d+\w)([a-e])|(\d+[x]\w+)|\bS(?P<Season>\d+)E(?P<Episode>\d+)|(\b[s]\d+[e]\d+)([a-e])

感謝您的任何幫助