Which makes no practical sense, does it?

Unnecessary to iterate over all letters of s2.

nice

It's anything but a good solution. Unnecessary lists, lambda functions and a while loop.

Ugly.

"get a string as text and an int as the rule of manipulation, and should return encrypted text"
So why don't you describe the rule?

"Find max(abs(length(x) − length(y)))" is the most retarded description I have found on this site in over 3 years.

pretty ugly tbh

Already done by someone

You need to delete the comment section. Then it must work.

will return an int value representing the unknown rune or -1 if no such rune exists.

okay nevermind haha

I don't understand this test case:
19--45=5? answer -1

19--45 = 64 right?
So how is the questionmark equal to -1?
and also what does it say then, 19--45=5-1 ?

What's going on here?

Yes.

You mean the last sample test in Python, right?

test.assert_equals(solve_runes("??*1=??"), 2, "Answer for expression '??*11=??' ");

Typo in the last test's description: Input: '??*1=??' "Answer for expression": '??*11=??'

Should be '1' instead of '11' in "Answer for expression"