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G z b

G z bG z bG z bG z bG z bG z b
G z bG z bG z bG z bG z bG z b
G z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z bG z b