Counting Machine

[Hand-E-Food]

Hello peoples.

I have also posted this puzzle as a challenge in the Open Design.

Puzzle: In this puzzle, RUGIXUF, you must put the correct number of crates into the counting machine and then give confirmation.  There are two inputs and one output:
Right: This output gives you how many crates to count.
Middle: Drop crates in here to count them, regardless of their number.
Left: Any cargo dropped in here will lock the middle input, and calculate the result.

Solution: My first solution, FIDURIP, can solve for all values except F.

[Mr K]

You built a lock into your the middle input, but you never took advantage of it. Here's a solution that solves for all values, and will keep trying to add to the middle input, so that lock must get engaged in time. recucum

[Rene]

I revisited an oldy that I did not solve yet. Here is my solution:

    zufimig

I am quite proud of how small the solution is 

[immibis]

luculom