Test 2102222222 is too hard for this solution.

Thanks. It's a problem only JavaScript.
I've checked Python, there is no one.

Please, add test 2102222222.
Half of these solutions fails.

Please, add test 2102222222.
Half of these solutions fails.

Zero One Two Three Four Five Six Seven Eight Nine

I've tested a JavaScript code and got some failed tests.

Please, specify the test with a and b edges

Test.assertEquals(solve(3,17),36);

Now tests wait answer 19, not 36.