| nice challenge. level 2 is better for this challenge |
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| 3 times reverse string. thanks for your challenge |
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| best for practice. thank you very much |
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| easy for newbie. thank you |
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| it is not easy, thank you, it make me happy, solution i posted |
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| nice challenge, you don't need patch. |
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| @Vrapper_1:I think the serial cannot be created because it change by random function
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