science experiment
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5 defs 45 3 defs 39 2 defs 36 3 defs 40 7 defs 41 3 defs 33 6 defs 42 3 defs 39 7 defs 42 3 defs 39 5 defs 40 5 defs 34 5 defs 40 3 defs 39 6 defs 40 6 defs 37 6 defs 34 3 defs 36 7 defs 39 6 defs 31 3 defs 32 6 defs 31 3 defs 35 3 defs 31 3 defs 32 6 defs 38 3 defs 41 6 defs 32 3 defs 34 3 defs 33