ONE TEST CASE NOT WORKING

i have written an O(n) solution which isn’t going to be a problem seeing the constraints. but one test case is showing wrong answer. can you tell me where have i gone wrong

@akshatsaraswat03 when you split the strings into two halves then a1 should be equivalent to b1 and so on, means the substrings too should follow equivalent conditions given in the problem.

i have considered it. its running correctly for that case when i tried