Bleeeet Bleeeet Bl Bleet! (Meaning: Convert English to Bleet)

We have praised goats as god for years now.

But if we can't translate English to 'Bleet', the Goat God's language, we cannot communicate with them.

So, to communicate with them, we have researched the activities of goats, and retrieved this pattern, which is the core of the language.


  Say 'Bleet' for the length of each words. That means the amount of 'e's should be (length-3) for words longer than 3 letters.You shall cut down 'Bleet' for words shorter than 'Blt'. For example, 'be' becomes 'bl', but 'cat' and 'boat' becomes 'blt' and 'blet'.


As it seems, they don't actually change non-alphabet characters to 'Bleet'. Our research showed that 'Hello, World!' to Bleet is 'Bleet, Bleet!' not 'Bleeet Bleeet'. Also, The goats are not so intelligent(no offense), so they don't  seem to understand non-ascii characters or diacritics at all.

Now, It's time to make a translator to communicate with the goat gods.

Bleeeeet (Meaning: Examples)

Hello, World! =&gt; Bleet, Bleet!
lorem ipsum dolor sit amet. =&gt; Bleet Bleet Bleet Blt Blet.
We praise the Goat God! =&gt; Bl Bleeet Blt Blet Blt!
I have a pen =&gt; B Blet B Blt
0123456789_ =&gt; 0123456789_
0te_st1 =&gt; 0Bl_Bl1
Retina, 31 bytes

T`lL`e
(?&lt;!e)e
B
Be
Bl
e(?!e)
t


Try it online!

Explanation

T`lL`e


Turn all letters into es.

(?&lt;!e)e
B


Turn the first e in each run into B.

Be
Bl


Turn Be into Bl.

e(?!e)
t


Turn the last e in each run into t.