science
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3 defs 20 2 defs 27 6 defs 22 6 defs 24 3 defs 20 3 defs 21 7 defs 26 5 defs 22 7 defs 21 2 defs 20 5 defs 20 7 defs 27 6 defs 34 2 defs 36 5 defs 33 6 defs 18 7 defs 32 5 defs 18 5 defs 23 3 defs 21 3 defs 17 7 defs 30 7 defs 20 5 defs 24 3 defs 31 5 defs 27 6 defs 23 6 defs 20 3 defs 24 3 defs 19