擅长:python、mysql、java
<pre><code>def replace_letter (word):
new_letter_list = []
for letter in word:
if letter not in "aeiou":
new_letter_list.append("_")
else:
new_letter_list.append(letter)
new_word = " ".join(new_letter_list)
return new_word
print(replace_letter ("jaywalk"))
</code></pre>