science
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5 defs 19 6 defs 20 7 defs 23 3 defs 15 6 defs 18 3 defs 13 7 defs 17 5 defs 13 7 defs 23 2 defs 15 2 defs 17 3 defs 14 5 defs 17 3 defs 17 3 defs 18 6 defs 19 6 defs 15 5 defs 18 6 defs 30 6 defs 18 6 defs 30 6 defs 20 6 defs 21 5 defs 16 3 defs 15 3 defs 12 5 defs 18 3 defs 16 2 defs 16 3 defs 15