science
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6 defs 13 5 defs 14 3 defs 15 6 defs 16 3 defs 16 3 defs 14 5 defs 22 6 defs 22 5 defs 16 6 defs 14 3 defs 17 5 defs 17 5 defs 14 6 defs 13 6 defs 15 6 defs 17 3 defs 18 5 defs 17 3 defs 15 7 defs 16 6 defs 20 7 defs 17 5 defs 16 7 defs 18 6 defs 18 3 defs 15 6 defs 18 6 defs 16 3 defs 16 6 defs 18