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ret: 0         st:-1 flags:0  ts:-1.000000
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ret: 0         st:-1 flags:1  ts: 1.894167
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ret: 0         st: 0 flags:0  ts: 0.788345
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ret: 0         st: 0 flags:1  ts:-0.317506
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ret: 0         st:-1 flags:0  ts: 2.576668
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ret: 0         st:-1 flags:1  ts: 1.470835
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ret: 0         st: 0 flags:0  ts: 0.365011
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ret: 0         st:-1 flags:0  ts: 2.153336
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