2,7,28,63,126()A.215 B.216 C.217 D.218

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2,7,28,63,126()A.215B.216C.217D.2182,7,28,63,126()A.215B.216C.217D.2182,7,28,63,126()A.215B.216C.217

2,7,28,63,126()A.215 B.216 C.217 D.218
2,7,28,63,126()
A.215 B.216 C.217 D.218

2,7,28,63,126()A.215 B.216 C.217 D.218
C