I tried to submit the solution with a first '0' for the coordinates which the number is less than 10 but it is always WRONG!
I verified also the example and differents grids but it doesn't work.
Can you confirm that the solution has only the coordinated cells on the path (completed with first '0' when <10) and without the first 'S' and the last 'F' ?
Thanks.
Great challenge !
Vexilla72