18
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C -2.2775619 -1.1493191 -0.4161380
C 0.8657980 -2.0033901 0.4478490
C 1.4680589 -1.1365730 -0.3736620
C 1.3324440 0.3228980 -0.4055040
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H -0.2706340 2.8101830 0.9390730