Simple question

This level is a "letter" version of Digits 0 to 9, a 2019 level by @MathTheMadTick which I strongly recommand to you !

The gameplay is exactly the same (it's a remake).
The purpose is identical : you have to compose signs on the pad, in order, to release a ball which, step by step, will end on the win block.

Two differences though :
#1 : Now, instead of digits, you will have to deal with letters, on an alphanumeric pad.
#2 : How to win : What letters will you have to write ? That's the question !

Spoiler: Help

Go back to the name of the level. And the sub-description

Spoiler: Alphabet graphism

I hope you have fun !

Amazing mechanism. I have more questions than anwers now. Or do I have more answers? I'm linguistically confused.

I almost gave up. But suddenly it dawned on me. I understood your riddle and your verbal pun.
I agree that the mechanism is very cool! Thank you, well done. From me 5

@Block builder
@Denis Nazin Well done for your perseverance ! Yes, you have to take my appetite for riddles, prinks and puns into consideration ! It’s not completely about mechanics
Thanks for playing, friends !

I don't know what to say, the insane mechanism has left me speechless but with many questions. Thanks @Valentin briliant job!

@delator77 now is the time for answers
Thanks for your comments !

Note for everyone :
I feel sorry not to have improved the gameplay of the original level.
The fact is there is not much room left for some hot action as the machine is so big ?!
Maybe I will make another copy of that level with another question to solve. We’ll see !