#Wall Follower

# Start moving southward

0 xxxx -> s 0

#When hit floor, turn east and continue

0 xxxS -> E 1

#Continue East

1 xxxS -> E 1

#When hit east wall, go north

1 xExS -> N 2

#Continue North

2 xexx -> n 2

#When hitting north wall, head west

2 Nexx -> w 3

#Continue West

3 Nxxx -> w 3

#When hitting west wall, head south

3 n