science experiment
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2 defs 24 3 defs 20 6 defs 19 6 defs 26 3 defs 37 7 defs 25 6 defs 19 6 defs 24 5 defs 17 3 defs 17 3 defs 24 5 defs 23 3 defs 18 3 defs 19 3 defs 28 3 defs 18 3 defs 22 3 defs 18 3 defs 17 3 defs 16 3 defs 18 3 defs 16 7 defs 22 3 defs 22 3 defs 16 3 defs 15 6 defs 15 3 defs 16 3 defs 19 3 defs 20