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Ginger by design.
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I don't get it.

A ROT was done to each character. ROT simply takes a character to the character n characters ahead of it. For instance, a ROT-3 would send a->d, b->e, etc.

That means ROT-26 sends a->a, b->b, c->c, etc, which is the identity map. A simple mathematical fact is that:

ROT-A(ROT-B(x)) = ROT-(A+B)(x)

The numbers he gave was the ROT function used on each character. To undo a ROT-3, you can either do a ROT-(-3) which, mod 26, is the same as ROT-23.

If you undo each ROT that way, you get assassination.

More generally, the set of all ROTs is a set of 26 permutations of the alphabet {a, ..., z}. It is specifically an abelian subgroup of S26.
 
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A ROT was done to each character. ROT simply takes a character to the character n characters ahead of it. For instance, a ROT-3 would send a->d, b->e, etc.

That means ROT-26 sends a->a, b->b, c->c, etc, which is the identity map. A simple mathematical fact is that:

ROT-A(ROT-B(x)) = ROT-(A+B)(x)

The numbers he gave was the ROT function used on each character. To undo a ROT-3, you can either do a ROT-(-3) which, mod 26, is the same as ROT-23.

If you undo each ROT that way, you get assassination.

More generally, the set of all ROTs is a set of 26 permutations of the alphabet {a, ..., z}. It is specifically an abelian subgroup of S26.

or +3 per letter in the sequence listed.
 
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