x 0
f 0
x 0
f 0
l 1
f 0
e 1
f 0
f 0
r 9
f 0
r 1
f 0
r 1
r 2
f 0
r 2
f 0
r 2
l 1
f 0
r 2
l 2
l 3
f 0
r 2
f 0
r 2
l 3
f 0
l 4
f 1
r 5
l 1
f 0
e 1
f 1
r 6
l 1
x 0
s 1.
