1a          D           l           r->d        0               A press first grass tile, then 2 tiles after

2a          U           d->u->r     d           0               A press at third tree trunk, then 2 before the end

3           U           d           l           0               A press on turn tile before grass, then 1 tile before the end

4a          U           d           d           0               No A presses

5b          U           u           r           0               No A presses

6a          D           l           d           1               No A presses