I am getting this error:

Expected property "a" to be "a&b=c?" but was "a%26b%3Dc%3F". Expected output
{"a":"a&b=c?"}

Need help.

Thank you so much for detailed explanation.

Expected 'false' on input of

1 2 3 4 5 6 7 8 9

2 3 1 5 6 4 8 9 7

3 1 2 6 4 5 9 7 8

4 5 6 7 8 9 1 2 3

5 6 4 8 9 7 2 3 1

6 4 5 9 7 8 3 1 2

7 8 9 1 2 3 4 5 6

8 9 7 2 3 1 5 6 4

9 7 8 3 1 2 6 4 5

Please check this test case.