by Asdnart
Each individual run must begin and at a large or small station. In your example neither of the two runs are legal.The alternative is to skip the halt in the first run, and do:
1st run: large-small-(skip halt)-large
2nd run: large-large
The alternative is to skip the halt in the first run, and do:
1st run: large-small-(skip halt)-large
2nd run: large-large