You will find the flag after decrypting this file Download the encrypted flag here.
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In Rot algorithm shift number can be any number from 0 to 25.
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RotN, where N denotes the shift number.
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Rot13 algorithm is a special variant, where shift-right (encryption) and shift-left (decryption) both gives the same output.
I think it's easy: I have 2 circles with the same index, rot1
This tool will help you: kt.gy
minhchi