python - 複数の単語の各文字を置き換える方法

Question

私はこのような配列を持っています:

input =  ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine" "thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"] 

私は出力したい=["thirty", "forty", "sixty", "seventy", "eighty", "ninety"]

import re 
chaine = ["thirtheen", "fourteen", "fifteen"] 
print re.sub(r'[een]', 'y', ' '.join(chaine))  

私は多くの方法を試します（..を置き換えます）が、私は立ち往生しています:/