science experiment
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5 defs 2 3 defs 3 3 defs 4 3 defs 6 6 defs 2 6 defs 4 3 defs 4 3 defs 2 6 defs 8 3 defs 3 7 defs 6 6 defs 1 3 defs 9 3 defs 6 3 defs 2 7 defs 4 3 defs 1 6 defs 3 3 defs 3 3 defs 3 3 defs 1 6 defs 4 3 defs 2 7 defs 2 3 defs 3 3 defs 2 3 defs 5 2 defs 2 3 defs 6 3 defs 5