natan,
I don't know how this test case worked but... "Attempt" did trigger this issue (0112 -> 2110). So if you ask me to remeasure (I couldn't, because "Attempt" blocked me from submission due to failure).

But as i mentioned... treating an Int in swift or Java, 0112 is the same as 112 (This happens before conversion of string). I would propose if we do find it, we should remove it.

http://onlineswiftplayground.run/
It doesn't seem to matter if it's string or not, the simple test here seems to show otherwise.

var test1 = 0122
var test2 = 122

print("Test one values (test1)") < -- "122"
print("Test Two values (test2)") <-- "122"
print(test1 == test2) <-- True

I just want to check, if my answer is incorrect. It seems that swift Int, removes leading zero by default.. So one test doesn't work:
0112 -> 2110

It seems that leading zero is removed in swift by default, hence 0112 when assigned is changed to 112. I want to know if anyone else dealt with this before (I've even used playground in swift to check)