e
e
(wear water gear)
e
(remove water gear)
n
e
n
n
e
n
e
n
n
(branches n, e)
e
e
e
e
e
n
e
e
n
e
e
(branches n, s)
s
s
e
s
e
e
s
e
(branches n, e, s)
s
open gates
s
close gates
e
e
e

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