(from fountain)
n
n
n
n
n
n
w
w
w
w
w
w
w
w
n
n
w
n
n
w
n
w
n
w
n
n
w
(train branches n, d)
n
n
(single file room)
n
w
n
w
n
w
n
w
n
w
n

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