science
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6 defs 18 4 defs 19 4 defs 15 3 defs 18 6 defs 18 7 defs 23 5 defs 21 6 defs 35 3 defs 17 6 defs 15 6 defs 24 5 defs 18 3 defs 18 3 defs 20 6 defs 17 6 defs 19 6 defs 19 3 defs 16 2 defs 17 3 defs 18 3 defs 19 5 defs 22 16 3 defs 19 6 defs 24 2 defs 17 6 defs 18 6 defs 20 6 defs 19 6 defs 19