How to display the shortest environment variable in the terminal?

Question

linux

Good evening. Can you tell me how to display the shortest environment variable in the terminal?

Answer 1

In what sense is it short, title or content?
You can sort like this

env | awk '{print length, $0}' | sort -n | awk '{$1=""; print $0 }'

Answer 2

print the list of variables starting from 1 character, then filter by 1 character, if the next output is empty then give 2 characters each and so on until any character appears on the output.
But the profit is really doubtful, can you give an example of a real benefit?
with the same success it is possible to derive variables that look "indecent" or the name offends the feelings of believers.